Winston-Salem - France's Nicolas Mahut caused an upset at the Winston-Salem Open on Tuesday with a 6-1, 7-6 (7-0) victory over third-seeded Tommy Robredo in the second round.
Robredo had his serve broken three times in the first set by the 104th-ranked Mahut, who then took four mini-breaks from Robredo in winning the second-set tiebreaker.
There were also surprise defeats for fourth-seeded Leonardo Mayer of Argentina, who was beaten 6-3, 6-1 by Belgian qualifier David Goffin, and for sixth-seeded Joao Sousa of Portugal, who lost 6-1, 3-6, 7-6 (7-5) to Poland's Jerzy Janowicz in the final tuneup event for next week's US Open.Results on Tuesday, the third day of the ATP tournament in Winston-Salem (x denotes seeded player):
Mikhail Kukushkin (KAZ x13) bt Robin Haase (NED) 5-7, 7-6 (7/2), 6-4
Nicolas Mahut (FRA) bt Tommy Robredo (ESP x3) 6-1, 7-6 (7/0)
Andreas Seppi (ITA x14) bt Federico Del Bonis (ARG) 7-5, 6-7 (4/7), 6-2
Marcel Granollers (ESP x8) bt Paul-Henri Mathieu (FRA) 6-3, 6-3
Jerzy Janowicz (POL) bt Joao Sousa (POR x6) 6-1, 3-6, 7-6 (7/5)
Edouard Roger-Vasselin (FRA x12) bt Oleksandr Nedovyesov (KAZ) 7-6 (11/9), 6-7 (5/7), 6-4
David Goffin (BEL) bt Leonardo Mayer (ARG x4) 6-3, 6-1
Donald Young (USA x11) bt Frank Dancevic (CAN) 6-1, 6-3
Sam Querrey (USA) bt Steve Johnson (USA x16) 6-4, 6-3
Kevin Anderson (RSA x2) bt Adrian Mannarino (FRA) 6-3, 2-6, 6-4