Sabine Lisicki of Germany hits a return against Ana Ivanovic of Serbia during their match at the Stanford Classic in California on Tuesday. Lisicki fired the fastest serve ever recorded at a WTA event on Tuesday, unleashing a 210.8 kph (131 mph) bomb in her first round loss to Ivanovic. Lisicki, who lost 7-6(2) 6-1, unleashed the serve in the opening set of their match on the plexipave hardcourt surface at Stanford University. She won the point despite former world number one Ivanovic getting her racket to the ball. The WTA said the serve bettered the previous record of 207.6 kph set by American Venus Williams at the US Open in 2007. “Well ... at least I broke the world record for fastest serve on @WTA ...,” Lisicki tweeted after her defeat.