Top-seeded Alexander Zverev said his nearly five-hour, five-set first round escape against Lorenzo Sonego was just what he needed to limber up for his US Open title tilt.AFP Sport looks at three matches to watch on Day 5 of the US Open:
Alexander Zverev (GER x1) v Quentin Halys (FRA)
Zverev leads head to head 1-0
— Zverev labored for four hours and 53 minutes to subdue Sonego in a wild five-setter lasting until nearly two in the morning.
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