Top seeds Zverev and Sabalenka advance to next round as Krueger stuns Fernandez

World number one Aryna Sabalenka reached the last 16 at the Miami Open when Elena-Gabriela Ruse retired injured on Saturday, while men’s top seed Alexander Zverev beat Jacob Fearnley 6-2 6-4 to reach the third round.

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Sabalenka, who arrived in Miami fresh off a defeat in last week's Indian Wells final, wrapped up the first set 6-1 before Romanian Ruse was forced to retire with a right thigh injury.

Up next for three-times Grand Slam champion Sabalenka will be American defending Miami champion Danielle Collins, who beat Swiss qualifier Rebeka Masarova 6-4 3-6 6-3.

Former world number one Naomi Osaka prevailed 7-6(6) 3-6 6-4 against American wildcard Hailey Baptiste and will play Italian sixth seed Jasmine Paolini, who advanced when Ons Jabeur retired with a left leg injury while trailing 4-3 in the first set.

Osaka, who returned to action in January 2024 after a 15-month break during which she had a baby, said her fitness level is better now than it was in 2021 when she won the most recent of her four Grand Slam titles.

“I feel like I'm better than 2021. You know, COVID really set me back, I'm not going to lie. I was in the house doing nothing,” said Osaka.