Kim Clijsters suffered a US Open setback on Friday when she withdrew from the warm-up Western and Southern Open with an abdominal injury, just 10 days before the Grand Slam event gets underway.

The 37-year-old, a three-time US Open champion, had been granted a wild card into the tournament.

It is usually staged in Cincinnati but has been moved to the bio-secure Billie Jean King Tennis Centre in New York — also the site of the US Open — due to the coronavirus pandemic.