Serena Williams admitted to having "some issues" with an muscle injury after appearing to struggle in her French Open semifinal victory against Kiki Bertens.
The reigning champion looked out of sorts on Friday, particularly in the first set of her 7-6 (7), 6-4 win on Court Philippe Chatrier.
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She now faces Spain's Garbine Muguruza in Saturday's final. It's a rematch of the 2015 Wimbledon championship, which Williams won.
Muguruza, the tournament's fourth seed, had little trouble defeating Australia's Samantha Stosur, 6-2, 6-4.