Postpublished at 20:08 British Summer Time 31 August 2020
*Schwartzman 6-3 6-4 2-6 1-6 5-6 Norrie
Schwartzman bats a backhand into the net, then a forehand and Norrie is two points away from victory.
Second Grand Slam of the season starts in secure bio-bubble at Flushing Meadows in New York
Kyle Edmund beats Kazakhstan's Alexander Bublik 2-6 7-5 7-5 6-0 in first round
Britain's Cameron Norrie comes from two sets down to beat Argentina's ninth seed Diego Schwartzman 3-6 4-6 6-2 6-1 7-5
American teenager Coco Gauff loses 6-3 5-7 6-4 to Anastasija Sevastova
Women's top seed Karolina Pliskova reaches second round; Petra Kvitova and Angelique Kerber also through
Novak Djokovic & Naomi Osaka play in the night session
Becky Grey
*Schwartzman 6-3 6-4 2-6 1-6 5-6 Norrie
Schwartzman bats a backhand into the net, then a forehand and Norrie is two points away from victory.
*Schwartzman 6-3 6-4 2-6 1-6 5-6 Norrie
Schwartzman opts to stay standing at the change of ends. Smart move by the looks of things, he might not get back up again.
It feels as though this is Norrie's match to lose now but it has been an amazing effort from the Brit. He was two sets down against the ninth seed and now a break will see him through to the US Open second round.
*Denotes next server
Naomi Broady
British player on BBC Radio 5 Live Sports Extra
This is now Cam's match.
I feel so sorry for Schwartzman, he can't bend his knees when he's walking.
*Schwartzman 6-3 6-4 2-6 1-6 5-6 Norrie
Schwartzman may be capitulating now. Norrie wraps up a hold to love in under two minutes with an ace.
Schwartzman 6-3 6-4 2-6 1-6 5-5 Norrie*
Incredible.
Schwartzman hits a backhand into the net and his legs will not be thanking him for that error. We're back on serve.
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
Not any time soon. We're back at deuce as Schwartzman returns to the baseline grimacing in pain.
Norrie has another break point and it feels as if a break would mean victory. Schwartzman might not last another game with his cramp.
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
Schwartzman hits a forehand long and Norrie has break point.
The real question is will this match ever end?
Judy Murray
Tennis coach on BBC Radio 5 Live Sports Extra
Schwartzman looks to me like he has the startings of cramp. He needs this game to be over.
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
It's almost a case of who makes the least errors now. Schwartzman's latest one is to knock a backhand into the sky. Deuce.
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
It doesn't look like it.
Norrie keeps himself in a lengthy rally but eventually cracks, tapping a forehand into the net to bring up 30-30.
Schwartzman looks pretty uncomfortable, but an error from Norrie gives the Argentine match point.
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
An ominous start for Schwartzman as the ball catches the wrong part of his racquet and flies into the sky and over the fence.
Another forehand into the net and he's 0-30 down. A chance for Norrie?
*Schwartzman 6-3 6-4 2-6 1-6 5-4 Norrie
He's done it! Norrie comes to the net and hits a forehand winner to put the onus back on Schwartzman.
This has been going on for almost four hours now... What a first-round match!
Schwartzman 6-3 6-4 2-6 1-6 5-3 Norrie*
A backhand into the net from Norrie brings up deuce and Schwartzman falls as he mis-hits a backhand on the baseline. He's back up and Norrie has game point again.
Schwartzman 6-3 6-4 2-6 1-6 5-3 Norrie*
"Come on!" shouts Norrie as he saves match point.
He follows it up with a "let's go!", trying to get himself back into this match.
A backhand drop-shot lands beautifully and Norrie has advantage.
Schwartzman 6-3 6-4 2-6 1-6 5-3 Norrie*
Norrie is sent running way off the back off the court and he's too far away to get the ball over the net. Match point Schwartzman.
Judy Murray
Tennis coach on BBC Radio 5 Live Sports Extra
There are too many unforced errors coming from Norrie now and that has given Schwartzman confidence.
Schwartzman 6-3 6-4 2-6 1-6 5-3 Norrie*
Schwartzman has got his swagger back as he smashes an overhead to bring up 15-15.
Norrie gives him a helping hand as he swings his backhand long. After all the grit he's shown to get to a fifth set, you'd hate him to lose on a break of serve.
Schwartzman snaps a backhand into the net. 30-30.
Schwartzman 6-3 6-4 2-6 1-6 5-3 Norrie*
That hand massage looks to have been just the trick for Schwarzman as he wraps up an easy hold to make the score a dangerous 5-3 in this final set.
*Schwartzman 6-3 6-4 2-6 1-6 4-3 Norrie
That turned into a pretty lengthy break. Not ideal for Cam Norrie as he attempts to stage a five-set comeback against the ninth seed.
They're back on court now though, with Schwartzman a break up.
*Schwartzman 6-3 6-4 2-6 1-6 4-3 Norrie
Schwartzman pops a mask and goggles on before he can have any treatment. He's getting it on his left hand it looks like.