London - Four-time Grand Slam winner Kim Clijsters will face Serbia's Ana Ivanovic in a battle of former world number ones in the third round of the Olympics at Wimbledon.
Clijsters is playing the penultimate tournament of her career as she prepares to retire for the second and final time after next month's US Open.
The 29-year-old, competing in the Olympics for the first time, remains on course to fulfill that dream after a 6-3, 6-3 victory over Spain's Carla Suarez Navarro in the second round on Monday.
Clijsters can expect a tougher challenge from her next opponent, Serbian 11th seed Ivanovic, who is also taking part in her first Olympics.
Ivanovic, the 2008 French Open winner, moved into the last 16 with a 6-4, 7-6 (7/5) victory over Britain's Elena Baltacha.