Petra Kvitova of the Czech Republic (Reuters)
Petra Kvitova's French Open comeback ended in the second round on Wednesday as she was knocked out in straight sets by American qualifier Bethanie Mattek-Sands.
The two-time Wimbledon champion was appearing in her first tournament since a horrifying knife attack at her home in the Czech Republic in December but lost 7-6 (7/5), 7-6 (7/5).
Mattek-Sands, the world number 117, will face 2010 Roland Garros finalist Sam Stosur of Australia for a place in the last 16.
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