The top two seeds are both out at the Abu Dhabi Women's Tennis Open after Sofia Kenin and Elina Svitolina suffered quarter-final defeats on Monday.
Kenin had won the two previous meetings against Maria Sakkari and appeared on course to retain her 100 per cent record when cruising through the opening set.
However, Sakkari hit back to stun the top seed, dropping just two more games as she rallied in emphatic fashion to triumph 2-6 6-2 6-0 after one hour and 23 minutes on court.
"I think I did way too many errors and I was hitting too big when I didn't have to. But I'm glad that once again I found the way to turn the match around," the ninth seed told reporters.
Next up for Sakkari will be Aryna Sabalenka, who extended her impressive winning run to 13 matches after coming through a three-set tussle with Elena Rybakina.
The fourth seed has not lost since going out at the 2020 French Open to Ons Jabeur - a result she avenged when the pair met on Sunday in the last eight in Abu Dhabi.
In the other half of the draw, Veronika Kudermetova once again got the better of Svitolina, ending the second seed’s hopes of success in the tournament.
Russian Kudermetova – who won their only previous meeting on the WTA Tour – came out on top in the deciding tie-break to triumph 5-7 6-3 7-6 (7-3).
She will take on another player from Ukraine next, Marta Kostyuk overcoming a nightmare opening set to beat Spaniard Sara Sorribes Tormo 0-6 6-1 6-4 and reach the last four.
Alcaraz's pursuit for third straight Madrid Open crown continues
Carlos Alcaraz boosted his hopes of a third straight Madrid Open title as he comfortably beat Thiago Seyboth Wild to reach the fourth round on Sunday.
Back in his home country of Spain, Alcaraz eased to a 6-3 6-3 triumph to set up a fourth-round clash with Jan-Lennard Struff, whom he beat in last year's final.
The first six games of the opening set went to serve, but Alcaraz found a crucial break in the seventh and ninth games of the set to put him in pole position for victory, a lead he would not relinquish as he overcame being broken in the seventh game of the second set to seal his safe progression.
Holger Rune was a surprise casualty as the world number 12 was defeated 6-4 4-6 6-3 by Tallon Griekspoor, though world number eight Andrey Rublev eased through with a straight-sets win over Alejandro Davidovich Fokina.
Data Debrief
With his triumph over Seyboth Wild at the Madrid Open, Alcaraz has now won 93.3 per cent of his games at the tournament. That is the highest win percentage of any player with at least 10 games played in a single ATP-1000 event since the format was introduced in 1990.
Against Seyboth Wild, Alcaraz won 27 of his 31 first-serve points, also recording 19 winners to his opponent's 10 as he dominated the contest on his way to victory.
Sabalenka goes the distance again to progress at Madrid Open
Aryna Sabalenka was forced to go the distance again at the Madrid Open as she battled past Robin Montgomery on Sunday.
Sabalenka, the reigning Madrid Open champion, needed three sets to win her second-round tie against Magda Linette on Friday, and the second seed did not have an easy ride against American Montgomery.
However, she eventually got over the line, triumphing 6-1 6-7 (5-7) 6-4 to tee up a last-16 meeting with Danielle Collins, who defeated Jaqueline Cristian 3-6 6-4 6-1.
Collins has now reeled off 15 straight wins, having won the Miami Open and Charleston Open in recent weeks, and has progressed to the last 16 in Madrid for the first time in her career.
The American said: "I've been doing so well the last couple of weeks, I think the girls know that when they come out and play me, they've got to go for it.
"That certainly was taking place the last two matches, some big shots that I've had to counter, and be able to react quickly."
Data Debrief: Sabalenka up there with Serena
Sabalenka has now won 14 of her 17 matches at the Madrid Open, which she won in 2023 and 2021.
Since the inception of the tournament, only Serena Williams (15) has won more of her first 17 matches at the event.
Alcaraz's pursuit for third straight Madrid Open crown continues by defeating Seyboth Wild
Carlos Alcaraz boosted his hopes of a third straight Madrid Open title as he comfortably beat Thiago Seyboth Wild to reach the fourth round on Sunday.
Back in his home country of Spain, Alcaraz eased to a 6-3 6-3 triumph to set up a fourth-round clash with Jan-Lennard Struff, whom he beat in last year's final.
The first six games of the opening set went to serve, but Alcaraz found a crucial break in the seventh and ninth games of the set to put him in pole position for victory, a lead he would not relinquish as he overcame being broken in the seventh game of the second set to seal his safe progression.
Holger Rune was a surprise casualty as the world number 12 was defeated 6-4 4-6 6-3 by Tallon Griekspoor, though world number eight Andrey Rublev eased through with a straight-sets win over Alejandro Davidovich Fokina.
Data debrief
With his triumph over Seyboth Wild at the Madrid Open, Alcaraz has now won 93.3 per cent of his games at the tournament. That is the highest win percentage of any player with at least 10 games played in a single ATP-1000 event since the format was introduced in 1990.
Against Seyboth Wild, Alcaraz won 27 of his 31 first-serve points, also recording 19 winners to his opponent's 10 as he dominated the contest on his way to victory.
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