Justine Henin (French pronunciation: ​[ʒys.tin enɛ̃]; born 1 June 1982), known between 2002 and 2007 as Justine Henin-Hardenne, is a Belgian retired professionaltennis player and former World No. 1. Henin won 43 WTA singles titles and seven Grand Slam singles titles, including four French Open titles, one Australian Open title, and two US Open titles. She has also won the year-ending Sony Ericsson Championships twice and the singles gold medal at the 2004 Summer Olympics.