Groth advances in Winston-Salem

Australia's Sam Groth is through to the next round of the Winston Salem Open after a hard-fought win over wildcard Jared Donaldson.

Australia's Sam Groth showed plenty of tenacity to beat American Jared Donaldson in the first round of the Winston-Salem Open on Sunday.

Groth, the world No. 53, had to fight all the way before winning 6-7 7-6 (10-8) 7-6 (7-5).

The Melburnian will meet 13th-seeded American Steve Johnson in the second round.

South Korea's Chung Hyeon also advanced, beating Britain's James Ward 6-7 (9-7), 6-4 6-3.

Taiwan's Yen-hsun Lu beat Robin Haase of the Netherlands 7-6 (7-4) 6-2; Argentina's Diego Schwartzman topped Spain's Daniel Gimeno-Traver 6-4 7-6 (10-8) and Colombia's Santiago Giraldo advanced when Belgium's Steve Darcis retired.