Roger Federer's bid for a third consecutive Australian Open title ended in a surprising 6-7 (11), 7-6 (3), 7-5, 7-6 (5) loss to 20-year-old Stefanos Tsitsipas, the first player from Greece to reach a Grand Slam quarterfinal
Federer, 37, shocked by Tsitsipas, 20, at Australian Open
