Defending champion Medvedev, top-seeded Alcaraz cruise into Miami Open quarterfinals

Defending Miami Open champion Daniil Medvedev won his 350th career match to move into the quarterfinals for a fourth straight year, beating Dominik Koepfer 7-6 (5), 6-0 on Tuesday.

Top-seeded Carlos Alcaraz also advanced with ease in a 6-3, 6-3 win over No. 23 seed Lorenzo Musetti.

Alcaraz, who beat Musetti in less than 90 minutes and looked comfortable as ever on the court, said he's "probably" playing his best tennis since last summer. That ankle injury from last month is no longer a concern, he said.

"I don't know if this is the best game that I'm playing, but without a doubt it's the best feeling," the Wimbledon champion said. "I'm feeling great on the court. I'm moving great. ... I'm not thinking about the ankle anymore on the court."

No. 3 seed Medvedev, after a tight opening set, pulled away to win his ninth straight match in south Florida and continue his run at back-to-back titles.

Medvedev trailed 4-0 in the tiebreaker before rallying to take the set. He said he used that momentum to get out to a fast start and finish his milestone victory.

"I would say before the match, the desire to win is the same, but for sure, the feeling of winning, and during the match while you're winning, is different," he said. "The feelings are different, but the desire is the same and that's what keeps me going."

Medvedev goes for victory No. 351 on Wednesday against Nicolas Jarry, the No. 22 seed who ousted No. 7 seed Casper Ruud 7-6 (3), 6-3.

Australian Open champion Jannik Sinner, seeded No. 2, improved to 19-1 in matches this year with a 6-4, 6-3 victory over Christopher O'Connell to reach the quarterfinals.

In the middle of the match, commentators said a spectator had fainted in the 82 degree temperatures and play was stopped.