Katarina Srebotnik is a Slovenian professional tennis player. She reached a career-high ranking of No. 20 on the Sony Ericsson WTA Tour on August 7, 2006. In juniors, she won the 1998 Wimbledon singles title and was singles runner-up at the US Open. Srebotnik made her ITF Debut in 1995. In 1998, Srebotnik won her first Tour doubles title at the Makarska Open. She won her fourth career doubles title at Estoril. Srebotnik and Križan won their only doubles title of 2001 at Hawaii. She won the Bogotá doubles title with Svensson. She won her second Grand Slam mixed doubles title at the US Open, this time with Bob Bryan. Her best season to date, highlighted by two singles and four doubles titles was in 2005. Srebotnik captured her third and fourth career Tour singles titles at Auckland. Srebotnik was the only player in 2005 to sweep singles and doubles titles twice. Srebotnik also won doubles titles at Budapest and Hasselt. In 2010, she also partnered with Serb Nenad Zimonjić to win the Mixed Doubles title with a thrilling tiebreak win against Yaroslava Shvedova and Julian Knowle. She reached the no. 1 position on the WTA doubles ranking on July 4, 2011.