Serena Williams rebounded from the worst beating of her professional career to rout Eugenie Bouchard 6-1, 6-1 at the WTA Finals on Thursday.
Williams was humbled by Simona Halep the previous day, when the 18-time Grand Slam champion won only two games.
She turned around and eliminated Bouchard from semifinals contention with a 0-3 record in the round-robin stage, while Williams improved to 2-1. The American will have to wait until Friday's match between Halep and Ana Ivanovic to know if she is through to the semis.
Williams will make the final four unless Ivanovic manages to beat Halep in straight sets.
Halep is guaranteed of a semifinal berth.
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