Lesia Tsurenko prevailed at the Hungarian Grand Prix in the longest match on the WTA Tour this year.
Tsurenko progressed to the quarter-finals in Budapest with a three-set victory over Kamilla Rakhimova.
It took three hours and 54 minutes for the Ukrainian to complete the 6-7 (1-7) 6-4 7-5 triumph, the match breaking the previous 2022 WTA record for duration, set in February when Daria Saville beat Emma Raducanu, the US Open champion retiring after three hours and 34 minutes in Guadalajara.
Martina Trevisan and Anna Bondar join Tsurenko as the first players through to the last eight.
Second seed Trevisan beat Natalia Szabanin and ninth seed Bondar overcame Despina Papamichail.
Sixth seed Zhang Shuai won her first-round match but top seed and 2021 French Open champion Barbora Krejcikova fell at the first hurdle to Wang Xiyu, losing in straight sets.
Fourth seed Anna Kalinina retired from her match with Katerina Siniakova and fifth seed Aliaksandra Sasnovich was defeated by Bernarda Pera.
At the Ladies Open Lausanne, Simona Waltert followed up her shock win over top seed Danielle Collins by beating Cristina Bucsa 6-1 5-7 6-4.
Third seed Irina-Camelia Begu lost to Anastasia Potapova, but fourth seed Sara Sorribes Tormo came through against Clara Burel.
Wimbledon semi-finalist Tatjana Maria withdrew from her match against Leolia Jeanjean.
Keys downs Gauff to reach Madrid Open quarter-finals
Madison Keys is through to the quarter-final of the Madrid Open for the first time in her career after rallying to a 7-6 (7-4), 4-6, 6-4 win over Coco Gauff on Monday.
The 29-year-old trailed 5-2 in the first set and 4-2 in the third set but rallied in both to come from behind to beat the number three seed.
Despite winning the second set, Gauff struggled to find her rhythm, suffering from 13 double faults, including two in the final game.
Keys will face former Madrid Open champion Ons Jabeur for a spot in the semi-final after the number eight seed overcame Jelena Ostapenko in straight sets.
Data debrief: Keys reaches new milestone
Having lost in the first round in seven of her nine previous trips to the Spanish capital, Keys has now bettered her previous best finish in Madrid - a third-round showing in 2016.
Keys hadn't won three matches in a row since reaching the US Open semifinals last year.
Keys downs Gauff to reach Madrid quarter-finals
Madison Keys is through to the quarter-final of the Madrid Open for the first time in her career after rallying to a 7-6 (7-4), 4-6, 6-4 win over Coco Gauff on Monday.
The 29-year-old trailed 5-2 in the first set and 4-2 in the third set but rallied in both to come from behind to beat the number three seed.
Despite winning the second set, Gauff struggled to find her rhythm, suffering from 13 double faults, including two in the final game.
Keys will face former Madrid Open champion Ons Jabeur for a spot in the semi-final after the number eight seed overcame Jelena Ostapenko in straight sets.
Data debrief: Keys reaches new milestone
Having lost in the first round in seven of her nine previous trips to the Spanish capital, Keys has now bettered her previous best finish in Madrid - a third-round showing in 2016.
Keys hadn't won three matches in a row since reaching the US Open semifinals last year.
Nadal goes the distance to reach Madrid Open last 16
Rafael Nadal battled to victory over three hours on the court against Pedro Cachin at the Madrid Open on Monday to seal a 6-1 6-7 (5-7) 6-3 win to reach the last 16.
The former world number one looked back to his best as he cruised through the opening set but was pushed hard in the second by Cachin.
Nadal came from behind to level at 5-5, but Cachin eventually sealed the set on his third set point.
The Spaniard then rallied in the third set, cutting down on his errors to regain control and advance to the fourth round at a tour-level event for the first time since 2022.
Nadal is one step away from booking his place in a 10th consecutive quarter-final in Madrid and will face Jiri Lehecka on Tuesday in the next round after the 30th seed overcame Brazilian qualifier Thiago Monteiro in two sets.
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