Hubert Hurkacz unleashed 17 aces to defeat France’s Arthur Rinderknech 7-6 (5), 6-2 and keep his title defence going at the Miami Open on Saturday as world No. 2 Daniil Medvedev showed twice winner Andy Murray the door and Naomi Osaka advanced on a walkover.

Rinderknech was unable to convert his sole break point in the first set and lost the momentum altogether after the tie-break, as the 10th-ranked Pole won the first four games of the second set of their second-round clash.

Reigning US Open champion Medvedev never faced a break and proved too nimble for three-time grand slam winner Murray, dropping just two of his first-serve points in the second set as he won 6-4, 6-2.

“Playing against Andy is never easy,” said Russian Medvedev, who is on a quest to regain his No.1 ranking. “Managed to serve well, and I think that was one of the keys today.”

Japan’s Osaka advanced to the fourth round on a walkover after Czech Karolina Muchova withdrew following an injury she sustained during warm-ups. The four-time grand slam champion will next face Alison Riske, who defeated Ann Li 6-2, 3-6, 6-3 in an all-American clash.

Tsitsipas advances

World No. 5 Stefanos Tsitsipas held off strong resistance from American qualifier J.J. Wolf and won 6-4, 6-7(5), 6-1. The Greek, who hit 37 winners, will next face Alex de Minaur who defeated fellow-Australian Jordan Thompson 6-2, 6-3.

“He’s a fighter,” Tsitsipas said of de Minaur. “I really hope to bring out the same kind of level that I brought in the third set and maintain that throughout the match.”

Spain’s 18-year-old Carlos Alcaraz secured his maiden win at the Miami event with a comfortable 6-3, 6-2 victory against Marton Fucsovics of Hungary.

Fresh from collecting the biggest title of his career at Indian Wells, American Taylor Fritz survived a surprise test from Kazakhstani qualifier Mikhail Kukushkin to win 6-3, 5-7, 6-3.

Fritz’s Indian Wells quarter-final opponent, Serbian Miomir Kecmanovic, dispatched seventh-seeded Canadian Felix Auger-Aliassime 6-4 6-2 and Spain’s Roberto Bautista Agut moved past Pole Kamil Majchrzak 6-3, 6-3.

Canadian Denis Shapovalov lost 6-3, 6-4 to Lloyd Harris of South Africa, American Jenson Brooksby defeated Nikoloz Basilashvili 6-3, 6-1 and Marin Cilic beat Alexei Popyrin 6-0, 6-3.

Bencic sails

In the women’s field, Australian Open finalist Danielle Collins beat Vera Zvonareva 6-1, 6-4, while Olympic champion Belinda Bencic eased past Heather Watson 6-4, 6-1. Swiss Bencic, who suffered early exits from Indian Wells earlier this month and Doha in February, launched five aces across the net as Watson struggled on the return.