Daniil Medvedev is one win away from retaking the world No.1 spot after moving past American Jenson Brooksby 7-5, 6-1 and into the Miami Open quarter finals on Tuesday.

The US Open champion lost his serve in the first game but found momentum after fending off two more break points in the fifth, winning the final four games of the first set in which he fired down six aces.

He ripped through the second set in less than half an hour, dropping one first serve point.

Medvedev will face defending champion Hubert Hurkacz in the quarters, with a win there moving the Russian back to world No.1 on Monday, two weeks after he lost the spot to Novak Djokovic.

Australian wildcard Nick Kyrgios lost to Italian Jannik Sinner 7-6 (7-3), 6-3 after a dispute with the chair umpire.

Kyrgios received a point penalty for bad behaviour in the first-set tie-break. In between sets he angrily and repeatedly asked the chair umpire ‘What is unsportsmanlike?’ before walking to his bench and whacking his racket against the court. The gesture earned him a game penalty, allowing Sinner to open the second set up a break.

Fourth-ranked German Alexander Zverev overcame Australian qualifier Thanasi Kokkinakis to win 6-4, 6-4 and set up a quarter final clash with eighth-ranked Casper Ruud.

The Norwegian had earlier sent top British player Cameron Norrie packing 6-3, 6-4. Hurkacz defeated South African Lloyd Harris 7-6 (7-3), 6-2, while Spain’s 18-year-old Carlos Alcaraz battled past Stefanos Tsitsipas 7-5, 6-3 in the night session.

Osaka on song

Naomi Osaka thumped 13 aces and 25 winners to dispatch an injured Danielle Collins 6-2, 6-1 to reach the semi-finals, where she will meet Tokyo Olympic gold medalist Belinda Bencic of Switzerland.

Bencic, who beat Daria Saville 6-1, 6-2, has won all three of the Tour-level meetings with the four-time grand slam champion, although they have not met since the 2019 US Open.“I’ve never had anything to lose against her,” Bencic said of her past success against the Japanese star.

Indians out

India’s Rohan Bopanna and Sania Mirza were knocked out from their respective doubles events after contrasting quarter final defeats in Miami. The Indo-Canadian pair of Bopanna and Denis Shapovalov went down 2-6, 1-6 to sixth seeds Wesley Koolhof of Netherlands and Great Britain’s Neal Skupski.

Sania and her Belgian partner Kirsten Flipkens fought hard but eventually lost 3-6, 6-7 (3-7) to China’s Ekaterina Alexandrova and Zhaoxuan Yang.