Tsitsipas exits with injury, 'left without answers'

Stefanos Tsitsipas was forced to retire from his Wimbledon first-round match with a back injury, saying he's "left with no answers" as he tumbles in the rankings.

Tsitsipas exits with injury, 'left without answers'
Stefanos Tsitsipas was forced to retire from his Wimbledon first-round match with a back injury, saying he's "left with no answers" as he tumbles in the rankings.