Norrie through as Tursunov retirespublished at 17:52 British Summer Time 28 August 2017
Norrie 7-6 (9-7) 6-1 Tursunov
Piers Newbery
BBC Sport at Flushing Meadows
It's pretty blustery out on Court 14 but Cameron Norrie - who has swapped his orange shirt for white - handles it beautifully, recovering from a loss of serve at the start of the second set with four straight games.
Tursunov then calls for the trainer at 7-6 4-1 down to get some strapping on his right knee. The Russian is ranked 645th as a result of numerous injuries and it looks a long way back when he immediately drops serve again.
A discreet fist pump from Norrie, a quick service game and he's one set from round two. Tursunov troops back to his chair looking less than primed for a fight back, and duly calls it a day as Norrie goes over to celebrate with his team.