No. 4 Steve Johnson of the United States squandered an early lead and lost to Radu Albot 1-6, 6-3, 7-6 (5). Albot will play McDonald on Saturday. No. 2 John Isner hit 24 aces and won every service game to beat Adrian Mannarino 7-6 (2), 6-4. Isner improved his career record against the Frenchman to 7-1.
Isner's opponent in the semifinals will be qualifier Dan Evans, ranked 148th, who swept No. 6 Andreas Seppi 6-4, 6-4.