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NOW: Dan Evans beats Marcos Giron 6-4 7-6 (7-3) 2-6 6-3 to reach third round of US Open
Andrey Rublev, Daniil Medvedev and Aryna Sabalenka among those in action on rain-hit third day
Defending champion Naomi Osaka into third round after walkover
Joe Salisbury, Cameron Norrie and Heather Watson among the Britons opening their doubles campaigns on day three
Simona Halep beats Kristina Kucova 6-3 6-1 on Arthur Ashe Stadium to reach third round
*Evans 6-4 7-6 (7-3) 2-6 3-3 Giron
Oh wow! Dan Evans thinks he's won the point, rushing to the net with Macos Giron on the run. But the American somehow reaches a volley from the Brit and sticks it back beyond him at the net with a superb passing forehand winner at full stretch. Deuce.
*Evans 6-4 7-6 (7-3) 2-6 3-3 Giron
Another double fault from Dan Evans, his fourth of the match and the pressure has cranked up for the British number one now. 40-30.
*Evans 6-4 7-6 (7-3) 2-6 3-3 Giron
No messing from Dan Evans here either... he races to 40-0 but then knocks down a double fault.
*Evans 6-4 7-6 (7-3) 2-6 3-3 Giron
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
I think this is an important game for Dan Evans to hold.
*Salisbury & Ram 6-3 4-3 Kwon & Sharan
Britain's Joe Salisbury and American partner Rajeev Ram is still doing well on court 4 in the men's doubles.
The fourth seeds are a set and a break up.
*Evans 6-4 7-6 (7-3) 2-6 3-3 Giron
Neither player has really been able to make a dent on the other's serve in this fourth set. Marcos Giron cruises to a love hold and passes the baton back to Dan Evans.
Image source, Getty Images*Koepfer 4-6 1-6 0-1 Medvedev
Second seed Daniil Medvedev is well on course. He's two sets up against German Dominik Koepfer on Arthur Ashe.
Image source, Getty ImagesEvans 6-4 7-6 (7-3) 2-6 3-2 Giron*
Double fault for Dan Evans, could do without those creeping in. A smattering of encouraging applause from the onlookers dotted around court 10. Evans dusts himself down and edges to 40-30, heading back off for his towel to wipe the sweat from his forehead and then pounding down a big serve to hold. He loves that.
*Evans 6-4 7-6 (7-3) 2-6 2-2 Giron
Marcos Giron is faffing with his baseball cap, it's still donned backwards after a quick shuffle.
Dan Evans looks to take it to the American but an ace down the T wraps up a hold for Giron.
Evans 6-4 7-6 (7-3) 2-6 2-1 Giron*
Getting quite vocal now, Dan Evans. He knows this is getting towards the business end and would love to wrap up the match in four sets. Marcos Giron shakes his head after finding the net and Evans takes a snappy love hold.
*Evans 6-4 7-6 (7-3) 2-6 1-1 Giron
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
That was a really good hold from Giron. In the end, it was quite a difficult volley.
There are several Britons in doubles action today.
Joe Salisbury and American partner Rajeev Ram are a set and a break up in the men's doubles.
Cameron Norrie is in action later alongside German partner Jan-Lennard Struff, while compatriot Jonny O'Mara and Aisam-ul-Haq Qureshi of Pakistan follow.
Neal Skupski completes the British men's doubles representation with American partner Jack Sock.
Heather Watson and Harriet Dart are in the women's doubles alongside partners Anna Blinkova of Russia and Chan Hao-ching of Taiwan respectively.
*Evans 6-4 7-6 (7-3) 2-6 1-1 Giron
Good battling from Marcos Giron, scuttling to the net to dish up a deft backhand slice on the volley and earn a big hold.
Evans 6-4 7-6 (7-3) 2-6 1-0 Giron*
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
You can hear how intense Evans is right now. He is jumping around in between points and racing from side-to-side.
Evans 6-4 7-6 (7-3) 2-6 1-0 Giron*
Ooof! Just wouldn't drop in for Dan Evans. Marcos Giron sent him out wide, came to the net and then sat back as the Brit hooked a forehand narrowly wide. Deuce.
Evans 6-4 7-6 (7-3) 2-6 1-0 Giron*
Now a chance for Dan Evans... edging to a mini break at 15-30 and then earning himself a break point as Marcos Giron flicks a backhand into the tape. Big moment for Evans.
Evans 6-4 7-6 (7-3) 2-6 1-0 Giron*
That's the quick start Dan Evans needed, rattling to 30-0. Marcos Giron gets on the board but Evans shrugs that off to hold and celebrates with a little "yes, Evo!".
Image source, Getty Images*Evans 6-4 7-6 (7-3) 2-6 0-0 Giron
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
It's about getting yourself switched on. Evans has played such good tennis so far in the match so he knows the level is there.
He has one set to go all out here then he is done and can recover for round three.
I think he has the ability to switch it on and off when he needs to.
*Evans 6-4 7-6 (7-3) 2-6 0-0 Giron
Right then. A quick rest and reset for Dan Evans, now can he take the fourth set to book his spot in the US Open third round?
Azarenka 6-3 7-6 Paolini
Belarusian 18th seed Victoria Azarenka is through to the third round. She has defeated Italian Jasmine Paolini 6-3 7-6.
Azarenka faces Garbine Muguruza next.