The US Open never disappoints when it comes to heated rivalries! After a marathon five-setter, Greek ace Tsitsipas lost his cool with Daniel Altmaier over an underarm serve in the fourth set. At the net, Tsitsipas warned, “Next time, don’t wonder why I hit you,” referencing a forehand he’d aimed at Altmaier earlier. Altmaier shrugged it off, calling it just heat-of-the-moment stuff. With Tsitsipas still searching for form, all eyes are now on Altmaier’s next match against de Minaur. #Sports #Tennis #USOpen