Zheng Jie is a Chinese professional tennis player. Her career high ranking is World No. 15 which she achieved on 18 May 2009. As of 5 August 2013, Zheng is ranked World No. 56 in singles and World No. 23 in doubles and is the 3rd ranked Chinese player. Zheng is one of the most successful tennis players from China. She has won four WTA singles titles – Hobart in 2005, Estoril, Stockholm in 2006, and Auckland in 2012. She has also won twelve doubles titles, eleven of them with Yan Zi including Wimbledon and the Australian Open in 2006. She won the bronze medal in doubles with Yan Zi at the 2008 Beijing Olympics. Her career high doubles ranking is World No. 3. Zheng has reached the singles semi-finals at the 2008 Wimbledon Championships, defeating a World No. 1, Ana Ivanovic, in the process, becoming the first Chinese female player to advance to the semi-finals at a Grand Slam. She also advanced to the semi-finals at the 2010 Australian Open.