Sabine Lisicki is a German professional tennis player who profile has a career high ranking of world number 12 on 21 May 2012. Lisicki has won three WTA singles tournaments in her career (one in 2009 and two in 2011) and one doubles tournament (in 2011). She reached the quarterfinals of the 2009 and 2012 Wimbledon Championships and the semifinals of the 2011 Wimbledon Championships. She had a very successful year, statistics wise, in 2007 when she won two ITF titles and defeated top-seed Katie O'Brien on 2 August 2007 at the Odlum Brown Vancouver Open. In 2008, she debuted in her first ever Grand Slam tournament. Lisicki won her first WTA Tour title without dropping a set, defeating the 5th seed Caroline Wozniacki in the Charleston final in 2009. At the 2011 Porsche Tennis Grand Prix, Lisicki partnered with former world no. 1 doubles player Samantha Stosur to win her first ever career doubles title. At the 2011 AEGON Classic, Lisicki reached the final where she defeated Slovak Daniela Hantuchova in 6–3, 6–2, to win her second WTA Tour title. In November, Lisicki was named the WTA comeback player of the year. In 2012, she competed in the summer Olympics held at London but failed to impress.