Collated results on Friday at the 576,000-dollar Thailand Open (x indicates new result).

Quarter-finals

x Novak Djokovic, 1, Serbia, def. Robin Soderling, 6, Sweden, 6-4, 7-5

Jo-Wilfried Tsonga, 2, France, def. Jurgen Melzer, 8, Austria, 6-3, 6-2

Tomas Berdych, 3, Czech Republic, def. Nicolas Mahut, France, 7-6 (8-6), 6-3

Gael Monfils, 4, France, def. Philipp Petzschner, Germany, 7-6 (8-6), 6-4