Jelena Janković, Serbian tennis player

Jelena Janković is a Serbian former professional tennis player. She was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for 18 weeks, including as the year-end No. 1 in 2008. Janković won 15 WTA Tour-level singles titles and two doubles titles, including the 2007 Wimbledon mixed-doubles title partnering Jamie Murray. Her career-best major performance in singles was a runner-up finish at the 2008 US Open.

February 28 is the 59th day of the year in the Gregorian calendar; 306 days remain until the end of the year.