Sabalenka wasn't in the mood to celebrate after her best friend Badosa was forced to retire their Stuttgart match.

Aryna Sabalenka hopes to make her fourth Porsche Tennis Grand Prix final this year, but to get there, she'll have to go through Marketa Vondrousova.

The reigning Australian Open champion outlasted a tearful "tennis soulmate," who retired with a leg injury at the Porsche Tennis Grand Prix.

World No.2 Aryna Sabalenka advanced to the Porsche Tennis Grand Prix quarterfinals on Wednesday, moving past an injured Paula Badosa 7-6(4), 4-6, 3-3 ret. after Badosa retired from their match due to a left thigh injury.

Aryna Sabalenka starts play in the round of 16 of the Porsche Tennis Grand Prix versus Paula Badosa, after exiting in the round of 32 in her last tournament (the Miami Open presented by Itau).

Paula Badosa has battled past Diana Shnaider 6-3, 6-4 to set up a match with friend and world No. 2 Aryna Sabalenka at the Porsche Grand Prix in Stuttgart.

No. 93-ranked Paula Badosa will meet No. 2 Aryna Sabalenka in the Porsche Tennis Grand Prix Round of 16 on Wednesday, April 17.Sabalenka is favored to win (-280) in this Round of 16 match versus

Paula Badosa battled past Diana Shnaider 6-3, 6-4 to set up a match with friend and world No. 2 Aryna Sabalenka at the Porsche Grand Prix on Monday.