Stefanos Tsitsipas heard boos from the crowd for yet another long trip off court at the U.S. Open after dropping a set during his second-round victory over Adrian Mannarino. Unbothered by that reaction Wednesday night, or the criticism he received from Andy Murray after taking breaks while beating him two days earlier, Tsitsipas pointed out that he's doing nothing that violates any regulation. The Grand Slam rule book just says players should take a “reasonable” amount of time, but does not provide an exact number of minutes that would be acceptable.
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‘What’s the issue?’ Tsitsipas undaunted by boos at US Open
