STANFORD, Calif. - The WTA says Sabine Lisicki has hit the fastest record serve in the history of the women's tennis tour, reaching 131 mph (211 kph).

Lisicki hit the serve at 5-5, 40-30 of a first-round loss against Ana Ivanovic in the Bank of the West Classic on Tuesday. Ivanovic got her racket on the ball, but the attempted return landed wide.

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The previous fastest WTA serve was 129 mph (208 kph), by Venus Williams at the 2007 U.S. Open.

Lisicki, a 24-year-old German, was the runner-up at Wimbledon in 2013.