Serena Williams beat old nemesis Maria Jose Martinez Sanchez in straight sets in the second round of the U.S. Open.
The 14-time Grand Slam champion won 6-2, 6-4 on Thursday. Williams overcame six double-faults and 24 unforced errors. The fourth-seeded American had 32 winners to five for Martinez Sanchez.
In the 2009 French Open third round, Williams hit a ball she was sure went off Martinez Sanchez's arm, then said the Spaniard cheated by not acknowledging it.
Martinez Sanchez has been ranked as high as 19th but is at No. 108 after struggling with a right thigh injury this year.
Williams next faces 42nd-ranked Russian Ekaterina Makarova.
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