Serena Williams upset by Petrova at Madrid Masters
{{#rendered}} {{/rendered}}MADRID (AP) — Top-ranked Serena Williams was upset at the Madrid Masters, falling 4-6, 6-2, 6-3 to Nadia Petrova of Russia in the third round.
Williams made 41 errors, while the 16th-seeded Petrova had 10 aces on Wednesday.
Williams had looked out of form in a marathon match against Vera Dushevina on Tuesday, which lasted 3 hours, 26 minutes. It was the longest match of her career.
{{#rendered}} {{/rendered}}Last year, Williams was beaten in the opening round in her first appearance at the Madrid Masters.
Williams' sister, Venus, moved into the fourth round by beating Francesca Schiavone 3-6, 6-1, 6-2.