Petra Kvitova's return to action came to an end in the second round of the French Open as she lost 7-6 (7-5) 7-6 (7-5) to Bethanie Mattek-Sands.
Kvitova, 27, only returned to full-time practice at the start of May after being stabbed in December.
The Czech - a two-time Wimbledon champion - suffered career-threatening injuries to her left hand.
She rallied from 3-1 down to take the second set to a tie-break but lost to the American on a double fault.
More to follow.