Learner Tien, a 19-year-old American qualifier, has outlasted marathon man Daniil Medvedev in an astonishing Australian Open boilover, sending the three-time finalist spinning out of the tournament in an exhausting, early-hours epic.
With the clock ticking towards 3am on Friday, the Californian teen, who'd looked down and out after the fifth seed made one of his trademark comebacks, found remarkable mental and physical reserves to pull off a 6-3 7-6 (7-4) 6-7 (8-10) 1-6 7-6 (10-7) triumph in 4 hours 49 minutes on Margaret Court Arena.
