Britain’s Dan Evans was forced to retire against Frances Tiafoe in Vienna after suffering what appeared to be a serious calf injury on Tuesday.
Evans, who was looking comfortable when leading 4-1 in the first set, pulled up after suffering a sharp pain in the back of his leg.
Despite seeking medical attention, the world No 35 was comforted by American Tiafoe as he pulled out of the contest.
It was only the second…