LONDON — A WTA spokesman says No. 1-ranked doubles player Bethanie-Mattek Sands is having tests on her injured right knee a day after hurting it during a match at Wimbledon.

Alexander Prior says in an email on Friday that Mattek-Sands, a 32-year-old American, "is currently undergoing more scans this morning."

Mattek-Sands fell and clutched at her knee, then began sobbing and screaming for help, in the third set's opening game of her second-round singles match Thursday.

In doubles, Mattek-Sands and partner Lucie Safarova came to Wimbledon seeking a fourth consecutive Grand Slam title in women's doubles.

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