BRUSSELS -- Belgium's Kirsten Flipkens has had to withdraw from the Fed Cup World Group playoffs because she has blood clots in a calf muscle.
Flipkens's absence leaves Tamaryn Hendler as Belgium's top-ranked player at No. 210 in the WTA standings.
Clijsters has a torn hip muscle and will return to the WTA Tour at the Madrid Open, which starts May 5. Wickmayer, Belgium's highest-ranked player at No. 30, wants to focus on the tour.