
MELBOURNE, Australia — Stefanos Tsitsipas twice smashed his racket onto his bag as he exited the Australian Open in the first round to the young American Alex Michelsen.
Tsitsipas, who’s enduring a miserable run of Grand Slam form, followed his U.S. Open first-round exit and second-round defeat at Wimbledon with another early departure here — and his frustration was painfully evident. Having lost the first two sets, Tsitsipas, 26, claimed the third only to immediately lose his serve at the start of the fourth. At the change of ends, Tsitsipas angrily gestured towards his box and twice...