SINGAPORE, Singapore, September 25, 2026: The Singapore Tennis Open reached Friday with four singles quarterfinals and finished the day with the draw turned almost completely on its head.
Every quarterfinal was won by the lower-ranked player.
World No. 25 Maja Chwalinska dismissed No. 19 and defending champion Elise Mertens 6-2, 6-2. No. 180 Tatiana Prozorova completed a third consecutive three-set comeback by beating No. 40 Wang Xinyu 3-6, 7-5, 6-4. No. 31 Leylah Fernandez removed world No. 5 and top seed Mirra Andreeva 6-2, 7-5. No. 63 Talia Gibson completed the sweep by defeating No. 33 Maria Sakkari 6-1, 4-6, 6-2.
The consequences went well beyond four upsets. Chwalinska earned her first career Top 20 victory. Fernandez reached her first semifinal of 2026. Prozorova and Gibson reached their first WTA Tour-level singles semifinals. By the end of Friday, neither the defending champion nor the top seed remained in the tournament.
Story at a glance
Singapore Open Friday Results at a Glance
Singapore is being played on indoor hard courts at OCBC Arena. The tournament returned to the WTA calendar at 250 level in 2025 and was upgraded to WTA 500 status this season, with a 28-player singles draw and 16-team doubles field.
Chwalinska Turned the Defending Champion Into Her First Top 20 Win
Maja Chwalinska entered Friday having lost only seven games across her opening two matches.
Prozorova Completed Her Third Comeback in Three Matches
Tatiana Prozorova has followed a completely different route through Singapore.
Fernandez Kept Her Hard-Court Grip on Andreeva
The largest ranking upset belonged to Leylah Fernandez.
Gibson Completed the Sweep by Beating Sakkari
Three lower-ranked players had already won by the time Maria Sakkari and Talia Gibson walked onto Center Court.
The day then took a troubling turn away from singles. Prozorova was struck around the face and eye during her doubles quarterfinal later Friday and retired from that match. A late report subsequently stated that the injury had also forced her out of Saturday’s singles semifinal.
For a tournament that had already lost several prominent players before or during the week, Friday became the clearest evidence yet that Singapore’s upgraded WTA 500 draw would not follow its original hierarchy.
Singapore Open Friday Results at a Glance
| Quarterfinal | Winner | Loser | Score | Ranking Gap |
|---|---|---|---|---|
| Maja Chwalinska vs Elise Mertens | Maja Chwalinska | Elise Mertens | 6-2, 6-2 | No. 25 beat No. 19 |
| Tatiana Prozorova vs Wang Xinyu | Tatiana Prozorova | Wang Xinyu | 3-6, 7-5, 6-4 | No. 180 beat No. 40 |
| Leylah Fernandez vs Mirra Andreeva | Leylah Fernandez | Mirra Andreeva | 6-2, 7-5 | No. 31 beat No. 5 |
| Talia Gibson vs Maria Sakkari | Talia Gibson | Maria Sakkari | 6-1, 4-6, 6-2 | No. 63 beat No. 33 |
Singapore is being played on indoor hard courts at OCBC Arena. The tournament returned to the WTA calendar at 250 level in 2025 and was upgraded to WTA 500 status this season, with a 28-player singles draw and 16-team doubles field.
The Sports Encounter has followed the draw from the beginning. The opening-day Singapore report already showed qualifiers and lower-ranked players disrupting expectations before Friday took the trend much further.
Chwalinska Turned the Defending Champion Into Her First Top 20 Win
Maja Chwalinska entered Friday having lost only seven games across her opening two matches.
She left having conceded only 11 across three rounds and having defeated the defending champion.
The fifth seed beat Mertens 6-2, 6-2 with the same variety that had carried her through the first half of the week. Rather than allowing Mertens to establish a predictable baseline rhythm, Chwalinska changed height, spin and pace repeatedly.
The match was level at 2-2 in the first set.
Chwalinska then won seven consecutive games and nine of the next 10, moving from an even opening into a 5-1 lead in the second set before closing the match.
Mertens committed 40 unforced errors. Chwalinska won 70 percent of her first-serve points and 60 percent behind her second serve, and she did not face a break point until the penultimate game.
The full significance of the result becomes clearer when set beside Chwalinska’s week.
She opened with a controlled 6-4, 6-2 victory over Rebecca Sramkova, covered in TSE’s report on Chwalinska’s Singapore opener.
She then overwhelmed Oleksandra Oliynykova 6-0, 6-1 in only 59 minutes, a performance examined in TSE’s analysis of her route into the quarterfinals.
Mertens represented a considerable jump in proven tour-level quality. The Belgian entered the week ranked No. 19, had won Singapore in 2025 and was trying to protect the title.
Chwalinska handled that jump without losing the control she had shown against lower-ranked opponents.
The WTA confirmed that Friday’s victory was Chwalinska’s first over a Top 20 opponent and sent her into her first semifinal since her remarkable run to the Roland Garros final in June.
It is her second tour-level semifinal overall.
Prozorova Completed Her Third Comeback in Three Matches
Tatiana Prozorova has followed a completely different route through Singapore.
Chwalinska has barely allowed opponents into her matches.
Prozorova has repeatedly allowed them ahead and then found a way back.
Wang won Friday’s opening set 6-3. For the third consecutive match, Prozorova therefore entered the second set one set from elimination.
She recovered 7-5, then won the deciding set 6-4 to reach the first WTA Tour-level semifinal of her career.
The pattern has become one of the tournament’s defining stories.
In the first round, Prozorova trailed Sofia Costoulas by a set and 4-2 before winning 5-7, 7-6(2), 6-2. TSE documented the full turnaround in Prozorova’s opening-round comeback.
Against Alexandra Eala in the second round, she again lost the opening set and again recovered, winning 4-6, 7-5, 6-3 after three hours and nine minutes. That victory gave the world No. 180 her first career Top 20 win.
Wang became the third opponent in succession to take the first set from Prozorova and still lose the match.
That is an extraordinary physical burden for a player making the deepest WTA run of her career. Three consecutive three-set matches require repeated recovery between rounds, and each of Prozorova’s victories has demanded that she rebuild the match after falling behind.
Her quarterfinal also closed a storyline that began earlier in the week. Wang had produced one of the tournament’s sharpest first-round performances when she dismantled Donna Vekic 6-1, 6-2, a result covered in TSE’s report on Wang’s emphatic victory.
The broader Singapore Day 2 report identified Wang’s dominance and Prozorova’s resilience as two contrasting stories from the same day.
On Friday, those paths collided.
Resilience won.
Fernandez Kept Her Hard-Court Grip on Andreeva
The largest ranking upset belonged to Leylah Fernandez.
World No. 31 faced world No. 5 Mirra Andreeva, the top seed and reigning Roland Garros champion, with one important piece of matchup history working in her favor.
Fernandez had never lost to Andreeva on a hard court.
That record is now 3-0.
The Canadian won 6-2, 7-5 in one hour and 32 minutes to reach her first semifinal of the season.
The first set belonged clearly to Fernandez after she saved two break points early and began drawing errors from Andreeva. The second required considerably more composure.
Fernandez moved ahead 5-2 and appeared close to finishing the match comfortably. Andreeva responded, recovered the break and leveled at 5-5.
Instead of allowing that recovery to grow into a deciding set, Fernandez broke again in the 12th game and closed the match.
Andreeva finished with 41 unforced errors, compared with 30 from Fernandez. Fernandez also edged the winner count 13-12.
The WTA described the result as Fernandez’s biggest victory of the season and her ninth career win over a Top 10 opponent.
The matchup itself has developed an unusually clear surface split. Andreeva won their two clay-court meetings. Fernandez has now won all three meetings on hard courts, in Hong Kong in 2023, Toronto earlier this season and Singapore.
That pattern adds tactical weight to the upset. Fernandez has repeatedly found ways to make Andreeva uncomfortable on quicker surfaces, where taking the ball early and redirecting pace can reduce the time available for the Russian to construct points.
Andreeva arrived in Singapore trying to reset after an intense Grand Slam season. TSE recently covered her difficult hard-court battle with Coco Gauff in the US Open quarterfinals.
Friday added another significant hard-court loss, this time against an opponent who increasingly looks like a specific matchup problem.
Gibson Completed the Sweep by Beating Sakkari
Three lower-ranked players had already won by the time Maria Sakkari and Talia Gibson walked onto Center Court.
Gibson made it four.
The Australian defeated the seventh-seeded Sakkari 6-1, 4-6, 6-2 to reach the first WTA singles semifinal of her career.
Gibson’s opening set immediately changed the tone of the match. She gave Sakkari little time to settle and raced through it 6-1.
The former world No. 3 responded in the second set. Sakkari took it 6-4 and forced Gibson into a deciding set, creating the kind of experience test that often separates a promising run from a genuine breakthrough.
Gibson responded with her strongest set after the reset.
She won the decider 6-2.
Her run is even more striking because her original path through the draw disappeared before she could face the player she had expected.
Second seed Amanda Anisimova withdrew with a left wrist injury before playing her opening match. Gibson, who had beaten Fiona Ferro 6-3, 6-3, instead faced lucky loser Viktoria Morvayova and survived two tiebreaks.
TSE covered the disruption in the report on Anisimova’s Singapore withdrawal.
Gibson has done considerably more than simply benefit from the vacancy. She has now won three singles matches at the tournament and beaten the world No. 33 to reach a WTA 500 semifinal.
The WTA’s Friday highlight package confirmed the breakthrough as Gibson’s first tour-level semifinal.
Why Friday Was More Than a Collection of Four Upsets
Upsets happen in every tennis tournament. What made Friday unusual was their completeness.
There were four singles quarterfinals.
The lower-ranked player won all four.
| Winner | Rank | Opponent | Rank | Friday Consequence |
|---|---|---|---|---|
| Maja Chwalinska | 25 | Elise Mertens | 19 | First career Top 20 win |
| Tatiana Prozorova | 180 | Wang Xinyu | 40 | First WTA semifinal |
| Leylah Fernandez | 31 | Mirra Andreeva | 5 | First semifinal of 2026 |
| Talia Gibson | 63 | Maria Sakkari | 33 | First WTA semifinal |
The ranking gaps also show that Friday was not driven by four nearly even matches.
Prozorova was 140 ranking positions below Wang.
Fernandez beat a Top 5 opponent.
Gibson eliminated a player 30 places above her.
Chwalinska’s gap with Mertens was smaller, but she was facing a Top 20 player and the defending champion.
The four winners also arrived through four different competitive paths.
Chwalinska dominated.
Prozorova recovered.
Fernandez managed a top seed who tried to fight back.
Gibson absorbed the loss of the second set and reasserted herself in the third.
That variety gives Friday more editorial value than a conventional upset roundup. The draw changed because four different players solved four different problems.
Singapore’s Draw Had Been Unstable Before Friday
The quarterfinal sweep did not emerge from an otherwise orderly tournament.
Singapore’s draw had already changed repeatedly.
Jessica Pegula withdrew before the tournament, moving Andreeva into the No. 1 seed position. Anisimova then withdrew with a wrist injury before playing. Barbora Krejcikova’s withdrawal gave Mertens a second-round walkover.
Those changes created openings, but Friday demonstrated that the remaining seeds still had to protect their positions on court.
Mertens could not.
Andreeva could not.
Sakkari could not.
The tournament began with a field deep enough to justify its new WTA 500 status. By Friday night, much of the original hierarchy had disappeared.
That progression can be followed from TSE’s opening-day report through the subsequent upsets, comebacks and withdrawals. Readers can follow the wider women’s and men’s tours through The Sports Encounter Tennis Hub.
Prozorova’s Doubles Injury Changed the Mood Late Friday
The most worrying development came after Prozorova had completed the biggest ranking upset of her run.
She returned to court in doubles alongside Sofya Lansere against third seeds Miyu Kato and Ellen Perez.
Kato and Perez led 7-5, 5-2 when Prozorova was struck in the face during the match.
She remained down, received treatment and eventually retired from the contest.
Late Friday, TennisActu reported that the eye injury had also forced Prozorova to withdraw from Saturday’s singles semifinal.
That report would give Gibson direct passage to the final if formally reflected in the tournament draw.
There is an important verification caveat. At the time of TSE’s final check, the WTA’s public Singapore pages had not yet fully reflected the late withdrawal. The injury and doubles retirement are well documented, while the singles withdrawal should therefore be treated as a reported late development pending tournament-side confirmation.
The timing is particularly cruel.
Prozorova had just produced the strongest tour-level week of her career. She had completed three consecutive comebacks, beaten her first Top 20 opponent and reached her first WTA semifinal.
The possibility that her singles run could end because of an injury suffered later in doubles changes what had been one of Friday’s most uplifting stories.
What Does Friday Leave for the Singapore Semifinals?
One semifinal is clear.
Chwalinska will face Fernandez in their first career meeting.
That matchup brings together two players arriving with very different tournament patterns.
Chwalinska has dropped only 11 games in three matches and has not lost a set.
Fernandez has just beaten the world No. 5 and owns the stronger established résumé at the highest levels of the tour.
Chwalinska’s ability to disrupt rhythm will be tested against a left-hander comfortable taking the ball early and changing direction. Fernandez, meanwhile, will face a player whose variation has repeatedly prevented opponents from settling into straightforward baseline exchanges.
The other semifinal was originally scheduled to place Prozorova against Gibson, two first-time WTA semifinalists.
Friday night’s injury development may remove that match entirely.
If Prozorova’s reported withdrawal is confirmed, Gibson will advance to the championship match without playing the semifinal.
That would provide one final twist to a tournament week already reshaped by withdrawals, walkovers, lower-ranked breakthroughs and four quarterfinal upsets on the same day.
What Friday Told Us About the Singapore Open
The tournament’s move to WTA 500 status increased the ranking points, prize money and expected depth of the field.
Friday showed what depth can look like when rankings stop predicting outcomes.
The No. 5 player in the world is out.
The defending champion is out.
A former world No. 3 is out.
A player ranked No. 180 reached the semifinals after three consecutive comebacks.
A player ranked No. 63 reached her first WTA semifinal.
A Roland Garros finalist earned her first Top 20 win.
A former US Open finalist rediscovered semifinal form by beating the top seed.
Singapore began Friday with four quarterfinals.
It ended with a semifinal field very few brackets would have predicted when the draw was made.
Continue the Tennis Story
Frequently Asked Questions
Who Won the Singapore Open Quarterfinals on Friday?
Maja Chwalinska, Tatiana Prozorova, Leylah Fernandez and Talia Gibson won the four women’s singles quarterfinals on September 25.
What Were the Singapore Open Friday Quarterfinal Scores?
Chwalinska beat Elise Mertens 6-2, 6-2; Prozorova beat Wang Xinyu 3-6, 7-5, 6-4; Fernandez beat Mirra Andreeva 6-2, 7-5; and Gibson beat Maria Sakkari 6-1, 4-6, 6-2.
Did Every Lower-Ranked Player Win on Friday?
Yes. Each singles quarterfinal was won by the player with the lower WTA ranking entering the week.
Who Produced the Biggest Ranking Upset?
Tatiana Prozorova produced the largest ranking gap, with the world No. 180 defeating No. 40 Wang Xinyu. Fernandez’s victory over world No. 5 Andreeva was the highest-ranked opponent defeated on Friday.
How Many Comebacks Has Tatiana Prozorova Produced in Singapore?
Prozorova has won three singles matches in Singapore, and she lost the opening set in all three before recovering to win in three sets.
Who Will Maja Chwalinska Play in the Semifinals?
Chwalinska is scheduled to face Leylah Fernandez. It will be their first career meeting.
Is Tatiana Prozorova Still Playing the Semifinal?
Late Friday reporting stated that Prozorova withdrew after suffering an eye injury during her doubles quarterfinal. The WTA’s public tournament pages had not fully reflected that update when checked, so TSE is treating the singles withdrawal as a reported late development pending tournament-side confirmation.
Is This Talia Gibson’s First WTA Semifinal?
Yes. Gibson’s three-set victory over Maria Sakkari sent the 22-year-old Australian into her first WTA Tour-level singles semifinal.
Is the Singapore Tennis Open a WTA 500 Tournament?
Yes. Singapore returned as a WTA 250 event in 2025 and was upgraded to WTA 500 level for 2026. The tournament is played on indoor hard courts at OCBC Arena.
When Is the Singapore Open Final?
The singles final is scheduled for Sunday, September 27, with the doubles final also taking place on Sunday.
Singapore Open
- Fernandez Wins Nine Straight Games to Take Singapore Crown as Gibson’s Breakthrough Falls Short
- Singapore Open Friday Turns Upside Down as Four Lower-Ranked Players Sweep the Quarterfinals
- Prozorova Escapes From the Brink Again, Stuns Eala as Singapore Quarterfinals Are Set
- Singapore Open: Chwalinska Sweeps Sramkova as Roland Garros Breakthrough Travels to Asia
