Zverev keeps title hopes alive: a nail-biting victory well past midnight

Top favourite Alexander Zverev avoided a disastrous start to his US Open campaign and scraped through to the second round in a five-set thriller. The French Open champion, seeded number one, defeated Italian outsider Lorenzo Sonego 6-4, 3-6, 6-7 (7-9), 7-5, 6-4.