Monday was anticipated as one of the highlight days of the tournament, but the schedule at the Mutua Madrid Open was disrupted. A widespread power outage affecting parts of Spain, Portugal, and southern France forced the suspension of six Round of 16 matches. Only two matches were completed that day: Coco Gauff defeated Belinda Bencic, and Mirra Andreeva overcame Yuliia Starodubtseva.
The remaining six matches were successfully started and concluded on Tuesday. This included top seeds Aryna Sabalenka and Iga Swiatek, who both advanced to the quarterfinals. Tuesday provided a full slate of tennis, bringing the delayed Round of 16 to a successful close despite the unusual interruption.
Round of 16 Match Results:
No. 4 Coco Gauff def. Belinda Bencic 6-4, 6-2
Gauff has now reached the quarterfinals at every active WTA 1000 event except her home tournament in Miami.
Watch: Gauff reaches first career Madrid quarterfinal
No. 7 Mirra Andreeva def. Yuliia Starodubtseva
With her victory on Monday, the Madrid Open became the first tournament where Andreeva has recorded 10 career wins at a single WTA event.
Watch: Mirra Andreeva ends Starodubtseva run to return to Madrid quarters
No. 2 Iga Swiatek def. No. 13 Diana Shnaider 6-0, 6-7 (3), 6-4
Swiatek has now reached 17 consecutive clay-court quarterfinals, a streak that dates back to her third-round loss to Ashleigh Barty in Madrid four years ago.
Watch: Swiatek battles past Shnaider in three sets to reach Madrid quarters
No. 5 Madison Keys def. No. 19 Donna Vekic 6-2, 6-3
Keys became the second American player to achieve 25 or more WTA-1000 match wins on clay, joining Serena Williams (44).
Watch: Keys overwhelms Vekic into second straight Madrid quarterfinal
No. 17 Elina Svitolina def. Maria Sakkari 6-3, 6-4
Before this season, Svitolina had never won consecutive matches at the Madrid Open in her nine previous appearances.
Watch: Svitolina beats Sakkari for eighth straight win, first Madrid quarterfinal
Moyuka Uchijima def. No. 21 Ekaterina Alexandrova 6-4, 7-6 (5)
Uchijima has made more WTA quarterfinal appearances in the past two weeks (Rouen and Madrid) than in her entire career before this run (Monastir in 2022).
Watch: Uchijima upsets Alexandrova in Madrid, reaches first WTA 1000 quarterfinal
No. 1 Aryna Sabalenka def. Peyton Stearns 6-2, 6-4
Sabalenka’s victory on Tuesday was her 28th of the season, giving her the tour lead in match wins, one ahead of Jessica Pegula.
Watch: Two-time champion Sabalenka returns to Madrid quarterfinals
No. 24 Marta Kostyuk def Anastasia Potapova 6-3, 6-2
Kostyuk has already recorded 11 WTA 1000 wins in 2025, marking her highest total in a single season at this level.
Watch: Kostyuk ousts Potapova to complete Madrid quarterfinal lineup
Jasper Hawthorne 
Dominic Ashworth