The Latest: Defending champ Federer ousted by Tsitsipas

MELBOURNE, Australia (AP) — The Latest on Sunday from the Australian Open (all times local):
11:05 p.m.
Two-time defending champion Roger Federer has been upset in the fourth round of the Australian Open by Stefanos Tsitsipas, who becomes the first player from Greece to reach the quarterfinals at a major.
Tsitsipas converted one of his three breakpoint chances in the match and fended off all 12 he faced to beat the 20-time major winner 6-7 (11), 7-6 (3), 7-5, 7-6 (5).
The 37-year-old Feder