Justine Henin is a Belgian former world No. 1 tennis player. She spent a total of 117 weeks as the world No. 1 and was the year-end No. 1 in 2003, 2006 and 2007. Henin, coming from a country with limited success in tennis, helped establish Belgium as a leading force in women's tennis alongside Kim Clijsters, and led the country to its first Fed Cup crown in 2001. She was known for her all-court style of play and for being one of the few female players to use a single-handed backhand.

The 2006 Sony Ericsson WTA Tour was the 36th season since the founding of the Women's Tennis Association. It commenced on January 2, 2006, and concluded on November 12, 2006, after 61 events.