Naomi Osaka walked into the Miami Open fourth round without striking a shot.

The second-seeded Osaka received a walkover into the round of 16 when Serbian qualifier Nina Stojanovic withdrew with a right thigh injury. Stojanovic was coming off a physical 5-7, 7-5, 6-2 win over 26th-seeded Yulia Putintseva in the second round.

More: Konjuh Shocks Swiatek

Osaka advanced to the Miami fourth round for the first time. The four-time Grand Slam champion will face either 16th-seeded Elise Mertens or 22nd-seeded Anett Kontaveit for a quarterfinal spot.




Reigning Australian Open and US Open champion Osaka has not lost a match since the pro circuit resumed last August. She carries a 22-match winning streak into the fourth round.

Photo credit: Rob Prezioso/Tennis Australia