On the court, they played each other in 25 WTA matches, making each of them the other's most frequent opponent. Although Clijsters won the series 13–12, Henin won seven out of their eleven meetings in finals including all three at Grand Slam tournaments. The latest stage win Clijsters had at a major was in the semifinals of the 2001 French Open. She also defeated Henin en route to her first WTA Tour Championship in 2002. Clijsters dominated their hard court meetings 8–4, while Henin dominated on clay 5–1. Henin also won three of their five grass court encounters. Before both of their first retirements, Henin was leading the series 12–10. However, Clijsters won all three of their meetings during their comebacks to win the series.