Veteran Tommy Haas stunned top seed Jo-Wilfried Tsonga in the second round of the BMW Open on home soil in Munich.
The 34-year-old German, a wild card entrant, had not reached the quarter-finals of an ATP World Tour event on clay for three years but he needed less than an hour to dump out world number five Tsonga 6-1 6-4.
In the last eight, the former world number two will meet eighth seed Marcos Baghdatis, who was given a torrid time by German qualifier Dustin Brown in the first set before recovering to win 1-6 6-4 6-4.
Sixth seed Mikhail Youzhny also had to come from a set down against Colombian Santiago Giraldo, the Russian eventually prevailing 6-7 (2/7) 6-4 6-4 to set up a meeting with Croatia's Marin Cilic, who was a comfortable 6-3 6-2 winner over Matthias Bachinger.
