Heather Watson beaten by Claire Liu in first round of Credit One Charleston Open | Tennis News

Briton Heather Watson, 29, was beaten 6-4 6-2 by Claire Liu, who converted four out of seven break-points in the match; Petra Kvitova retires in the second set against Magdalena Frech

Heather Watson was knocked out in the first round of the Charleston Open

Heather Watson was beaten in straight sets by Claire Liu in the first round of the Credit One Charleston Open.

The Briton lost 6-4 6-2 to the 21-year-old American.

Despite getting more of her first serves in, Watson was unable to capitalise, winning just half of the points on the first serve.

Liu also dominated on the returns, and converted four out of seven break-points in the first meeting between the two players.

Also in Charleston, Petra Kvitova retired in the second set, having lost the first against Magdalena Frech.

Frech had taken a close first set 7-6 (6) and was leading 3-2 in the second when the Czech player retired.