Rafael Nadal was behind by a set and down a service break at 5-4 in the second set before he mounted a challenging comeback to beat Karen Khachanov.
Rafael Nadal rallies past Karen Khachanov in tense 4-hour match at US Open
Rafael Nadal was behind by a set and down a service break at 5-4 in the second set before he mounted a challenging comeback to beat Karen Khachanov.
