Injured Tsonga stops after third set at Wimbledon
The 39th-ranked Gulbis was leading the second-round match 3-6, 6-3, 6-3 when Tsonga quit. Tsonga was the runner-up at the 2008 Australian Open and a semifinalist at the All England Club each of the past two years.
Following the second set, Tsonga sat on the grass while a trainer wrapped tape below his left knee.
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