Earlier, third seeds Rohan Bopanna and his American partner Rajiv Ram, also playing together in their first tournament, went down 6-0, 4-6, 1-10, to the French-Swiss combination of Benoit Paire and Stanislas Wawrinka.
The results (prefix denotes seeding):
Doubles (quarter-finals): Raven Klaasen (RSA)/Nicholas Monroe (US) bt 1-Mahesh Bhupathi (IND) /Daniel Nester (CAN) 6-4, 7-5; Benoit Paire (FRA)/Stanislas Wawrinka (SUI) bt 3-Rohan Bopanna (IND)/Rajiv Ram (US) 0-6, 6-4, 10-1; Andre Begemann/Martin Emmrich (GER) bt Aljaz Bedene/Blaz Kavcic (SLO) 7-6 (1), 6-1.