INDIAN WELLS, Calif. -- Carlos Alcaraz is three victories away from returning to the world's top ranking, having reached the quarterfinals of the BNP Paribas Open on Tuesday.
Alcaraz, ranked No. 2, advanced when Jack Draper retired with the Spaniard leading 6-2, 2-0 after 46 minutes of play. It was Alcaraz's 101st ATP Tour victory.
"I would say I returned well, I hit great shots," Alcaraz said. "I finished the match with confidence in my shots, to come into the next round with more confidence."
Draper was affected by an abdominal injury that first surfaced in his win against Andy Murray a day earlier. The injury affected the Brit's serve, which dropped well below 100 mph, and his movement. An athletic trainer visited him between sets and Draper won just one point in the first two games of the second set before quitting.
Coco Gauff rallied from a break down in the third set to beat Swedish qualifier Rebecca Peterson, 6-3, 1-6, 6-4 to reach the quarterfinals.
Down 4-2, Gauff fought her way back and saved three break points while serving at 4-all before closing out the match in the next game.
Four years ago, Peterson routed a then-14-year-old Gauff at a Challenger tournament in Michigan.
"She whopped me really bad," Gauff said on court. "I think today was really a mental thing, just staying in the match. I wasn't playing my best in some moments and I wasn't serving as well as I'd like to, but I think that my mentality kept me in."
The sixth-seeded American next plays No. 2 seed Aryna Sabalenka, who beat 16th-seeded Barbora Krejcikova, 6-3, 2-6, 6-4.
World No.1 Iga Swiatek continued her title defense with a 6-3 6-1 victory over US Open champion Emma Raducanu to set up a quarterfinal against unseeded Romanian Sorana Cirstea.
Swiatek came under pressure early in the opening set but some clean ballstriking helped her hold for a 3-2 lead after two tight service games. She raised her level further to break Raducanu in the next game before pulling away.
No. 3 Jessica Pegula lost to 15th-seed Petra Kvitova 6-2, 3-6, 7-6 (11) after the American blew four match points
"When the match like this, very exhausting," Kvitova said. "Up and down. Definitely it's one of the best matches I've played."
Sorana Cirstea took out No. 5 Caroline Garcia 6-4, 4-6, 7-5, No. 7 Maria Sakkari beat 17th-seeded Karolina Pliskova 6-4, 5-7, 6-3 and No. 10 Elena Rybakina defeated Varvara Gracheva 6-3, 6-0.
On the men's side, defending champion Taylor Fritz moved into the quarters with a 6-4, 6-3 win over Marton Fucsovics.
No. 5 Daniil Medvedev overcame a swollen right ankle and outlasted 12th-seeded Alexander Zverev, 6-7 (5), 7-6 (5), 7-5.
"When I rolled my ankle, I rolled it pretty hard," he said. "At the moment I rolled it I was like, 'OK, I'm going to stand up and it's going to be fine,' but then I continued to stay on the ground because the pain was only growing. It was definitely a crazy match."
Medvedev took a medical timeout to have his ankle taped in the second set before going on to notch his 17th consecutive match win and improve to 22-2 this year.
"This one was definitely the toughest one of all," he said on court.
Zverev added to the drama by saving a match point and breaking for 5-5 in the final set. Medvedev broke right back and went on to win.
He next plays Spain's Alejandro Davidovich Fokina, who beat Cristian Garin 6-3, 6-4.
No. 10 Cameron Norrie, the 2021 champion, beat sixth-seeded Andrey Rublev, 6-2, 6-4. Norrie improved to 21-3 this year.
Norrie advanced to a quarterfinal against Frances Tiafoe, who beat qualifier Alejandro Tabilo, 6-4, 6-4.
No. 11 Jannik Sinner defeated Stan Wawrinka 6-1, 6-4.
Eighth-seeded Felix Auger-Aliassime saved six match points, coming back from 3-6 down in the third-set tiebreak, to beat No. 17 Tommy Paul 3-6, 6-3, 7-6 (6) and advance to the quarterfinals at Indian Wells for the first time.
The Associated Press and Reuters contributed to this report.