Unheralded Slovakian Martin Klizan caused the shock of the tournament on Thursday as he knocked out fifth seed Jo-Wilfried Tsonga in the second round of the US Open.
The Frenchman, who had been seeded to meet Olympic champion Andy Murray in the quarter-finals, was horribly out of sorts and crashed out 6-4 1-6 6-1 6-3.
Tsonga, a quarter-finalist here last year and a semi-finalist at Wimbledon last month, looked like he had turned things around in the second set but instead Klizan pulled away again in the third. The Slovakian then opened up a 4-0 lead in the fourth set and, although Tsonga responded to reduce the deficit to 4-3, it was not good enough.
Eleventh seed Nicolas Almagro had to fight back from two sets to one down to defeat German Philipp Petzschner 6-3 5-7 5-7 6-4 6-4 while 17th seed Kei Nishikori beat Tim Smyczek of the US 6-2 6-2 6-4.