WEDNESDAY’S KEY RESULTS

Men’s quarterfinals — Kei Nishikori (6) def. Andy Murray (2), 1-6, 6-4, 4-6, 6-1, 7-5.

Women’s quarterfinals — Serena Williams (1) def. Simona Halep (5), 6-2, 4-6, 6-3; Karolina Pliskova (10) def. Ana Konjuh, 6-2, 6-2.

THURSDAY’S FEATURE MATCHES

(TV: 7 p.m., ESPN)

Women’s semifinals — Serena Williams (1) or Simona Halep (5) vs. Karolina Pliskova (10); Caroline Wozniacki vs. Angelique Kerber (2).