The 24-year-old was suffering from what appeared to be a knee injury that flared up in the second set, and he eventually pulled out at 3-6, 6-3, 4-1 down against the Argentine Tomas Martin Etcheverry.
The 24-year-old was suffering from what appeared to be a knee injury that flared up in the second set, and he eventually pulled out at 3-6, 6-3, 4-1 down against the Argentine Tomas Martin Etcheverry.
