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Stefanos Tsitsipas beats Andy Murray 6-2 6-7 (7-9) 6-3 3-6 6-4 on Arthur Ashe in first round
British number one Dan Evans beats Brazil's Thiago Monteiro 6-3 6-7 (6-8) 6-4 6-1
Britain's Heather Watson and Harriet Dart make first-round exits
British number one Johanna Konta pulls out of tournament hours before her scheduled first-round match
Later: Cameron Norrie v Spain's Carlos Alcaraz
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
Should Andy still be this annoyed about Tsitsipas' toilet break now?
It is so hard to let it go when you're in that situation but when he was playing at his best in this game was when he was angry in a positive way about his own game.
*Murray 6-2 6-7 (7-9) 6-3 3-6 0-2 Tsitsipas
Murray gets started on the Tsitsipas serve as the Greek sweeps into the net, but he fires wide on his backhand and Tsitsipas takes charge.
An ace completes a comeback hold from 0-15 and Murray finds himself 2-0 down.
#bbctennis
Dan Reader: Taking the third seed to five sets after basically 4 years of no tennis and having to learn how to walk again shows how unbelievable this guy is. Come on Andy!
Murray 6-2 6-7 (7-9) 6-3 3-6 0-1 Tsitsipas*
It's the ideal start for Tsitsipas in the decisive set, and just what Murray didn't want.
The third seed breaks, and finds himself ahead at last after twice fighting back from a set down.
Image source, Getty Images*Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
Time for a cool head now. An error by Murray hands Tsitsipas a first break point opportunity in the fifth.
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
Andy is so pumped up after every single point. People are on their feet.
David Law
Commentator on BBC Radio 5 Live Sports Extra
Murray is trading blow for blow with the third best player in the world.
*Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
'Let's go' roars Murray, as Tsitsipas pulls wide for 30-15.
The Greek gets back on track on the next point though, nailing a smash for 30-30.
#bbctennis
Sarah Knowles: Let's go, Andy. Let's go!
Jiten Chandarana: It’s good that Murray is serving first in the fifth...first game crucial that he holds and stays ahead in the score.
*Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
A time violation warning for Tsitsipas, as Murray gets the crowd going before getting the fifth set under way.
Here we go...
Image source, Getty Images*Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
Andy Murray is having a word with the umpire about the length of Stefanos Tsitsipas' break here. It's Murray to serve first in the deciding set and he'll be desperate to make a good start.
After about eight minutes, the third seed has eventually returned...
Linette 7-5 3-6 0-3 Gauff*
Coco Gauff - seeded 21st - is back on track on Louis Armstrong.
The 17-year-old lost the first set to Poland's Magda Linette but claimed the second and is two breaks up in the decider.
*Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
Tsitsipas heads for a bathroom break while Murray opts for a change of T-shirt and some court-side air conditioning as anticipation builds ahead of what should be a brilliant fifth set battle.
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
My head is saying Tsitsipas, my heart is saying Andy.
I think he can do it. He still looks like he has enough in the tank.
Most importantly, it looks like he absolutely believes he can do this.
Russell Fuller
Tennis commentator on BBC Radio 5 Live Sports Extra
What an almighty battle.
We are about to see just how much both of these players have in the tank.
Murray 6-2 6-7 (7-9) 6-3 3-6 0-0 Tsitsipas
We're going to a fifth set on Arthur Ashe Stadium!
What a match.
Image source, Getty ImagesMurray 6-2 6-7 (7-9) 6-3 3-5 Tsitsipas*
A miss from Tsitsipas out wide.
One more set point.
Murray 6-2 6-7 (7-9) 6-3 3-5 Tsitsipas*
Tsitsipas puts away a forehand volley for 30-0 to close in on the set again, and an overhead smash brings up two set points.
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
It says a lot about Andy's character that he's still grinding every point down.
Even down 5-0 he still thinks he's in the set. He recognised Tsitsipas lost concentration and took advantage of it.
Murray 6-2 6-7 (7-9) 6-3 3-5 Tsitsipas*
And Murray does hold from set point down, putting the pressure back on Tsitsipas. A phenomenal effort.
Image source, Getty Images