Jannik Sinner has won back-to-back Australian Open titles, but his pursuit of a third straight trophy is in jeopardy. Eliot Spizzirri leads the No. 2 player in the PIF ATP Rankings 6-4, 3-6, 3-1, with play suspended at about 2:35 p.m. local time due to the tournament's heat rule in order to close the Rod Laver Arena roof.
