Chennai Open men's singles quarter-final results

Chennai Open men's singles quarter-final results from India on Friday.

3-Stanislas Wawrinka (Switzerland) beat 8-Robin Haase (Netherlands) 3-6 6-3 6-3 6-Janko Tipsarevic (Serbia) beat Kei Nishikori (Japan) 6-4 6-4 1-Tomas Berdych (Czech Republic) beat Blaz Kavcic (Slovenia) 6-3 6-3 7-Xavier Malisse (Belgium) beat Bjoern Phau (Germany) 6-0 6-2