Novak Djokovic turned back a challenge by American Frances Tiafoe on Wednesday, ultimately prevailing in four, hard-fought sets to advance to the third round at the Australian Open. The top-seeded Djokovic defeated Tiafoe 6-3, 6-7 (2-7), 7-6 (7-2), 6-3 in a 3.5-hour match. Djokovic Breaks Through in Fourth Set The […]