Osaka grinds past Sorribes Tormo to book spot in Madrid round of 16

On Tuesday, Naomi Osaka breathed a sigh of relief after a tough three-setter, grinding past Sara Sorribes Tormo, 7-6 (5), 3-6, 6-0, to book a spot in the fourth round of the Mutua Madrid Open.

After she narrowly grabbed the first set, Osaka's game abandoned her in the second, accumulating more errors than winners. A bathroom break helped her regroup as she pulled away to close out the match without losing a game in the decider.

A few weeks ago, the world No. 1 withdrew from her semifinal match in Stuttgart with an abdominal injury, but she says she's now injury-free.

"I was just resting it," Osaka told the press in Madrid. "Of course I hit ground strokes... it's not like I could fully rest, but it's not painful, so I think it's looking good."

She will meet either Anna Karolina Schmiedlova or Aliaksandra Sasnovich for a quarterfinal spot.