Jelena Janković (Serbian Cyrillic: Јелена Јанковић, ; born on February 28, 1985) is a Serbian professional female tennis player. She entered the Women's Tennis Association (WTA) top 15 in September 2006 when she reached the semifinals of the U.S. Open. In early 2007, she broke into the top 10 and subsequently entered the top 3 when she reached the semifinals of the 2007 French Open. She won the mixed doubles title at Wimbledon in 2007 with partner Jamie Murray.