Top-seeded Rafael Nadal overcame stiff resistance from Bernard Tomic to reach the semifinals of the Mercedes Cup in Stuttgart, Germany, with a 6-4, 6-7 (6), 6-3 victory. Nadal will next play the fourth-seeded Gaël Monfils, who beat Philipp Kohlschreiber, 7-5, 3-6, 6-3.
Also, second-seeded Marin Cilic served 19 aces to rally past the qualifier Mischa Zverev, 4-6, 7-6 (5), 7-6 (5), to set up a semifinal against eighth-seeded Viktor Troicki, who beat Sam Groth, 7-6 (3), 6-1.