Steve Johnson wins in Winston-Salem after Yen-Hsun Lu retires
WINSTON-SALEM, N.C. (AP) Second-seeded Kevin Anderson of South Africa beat eighth-seeded Borna Coric of Croatia 6-2, 7-6 (1) on Thursday night to advance to the semifinals in the Winston-Salem Open.
Anderson, ranked 15th, will face 88th-ranked Malek Jaziri of Tunisia, a 6-3, 6-2 winner over sixth-seeded Thomaz Bellucci of Brazil.
American Steve Johnson advanced when Taiwan's Yen-Hsun Lu withdrew because of a back injury.
Johnson, seeded 13th and ranked 49th, will play French qualifier Pierre-Hugues Herbert.
Herbert, ranked 140th, beat Pablo Carreno Busta of Spain 4-6, 7-6 (5), 6-2 to reach his first semifinal.
Lu was hurt late in the third set Wednesday in his 7-6 (1), 1-6, 7-5 victory over South Korea's Hyeon Chung. He was treated after the match and Thursday morning, but the pain and cramping persisted during practice.