Australian Open champion Aryna Sabalenka needed just over an hour to beat former French Open winner Barbora Krejcikova 6-3, 6-2, while Elena Rybakina beat Elise Mertens 6-4, 6-3 at the Miami Open on Monday.

Earlier, Stefanos Tsitsipas beat Chilean qualifier Cristian Garin 6-3, 4-6, 6-4 to set up a men’s singles fourth-round meeting with Russian 14th seed Karen Khachanov, who won 6-2, 6-4 against Czech Jiri Lehecka.

Argentine Francisco Cerundolo stunned fifth seed Felix Auger-Aliassime 6-2, 7-5, while Frenchman Adrian Mannarino knocked out eighth seed Hubert Hurkacz 7-6 (7-5), 7-6 (7-0) and American Frances Tiafoe lost 6-3, 6-4 to Lorenzo Sonego.

Former US Open champion Bianca Andreescu left the court in a wheelchair after retiring hurt from her last-16 match against Ekaterina Alexandrova.

Alexandrova advanced 7-6 (7-0), 0-2 (retired) and will next face Petra Kvitova, who defeated Varvara Gracheva 7-5, 7-6 (7-5).

In other women’s matches, third seed Jessica Pegula beat Poland’s Magda Linette 6-1, 7-5.