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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 Giron
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
It's difficult. Do you try and get a double break back? Or is that unrealistic and you save it for set four?
Evans 6-4 7-6 (7-3) 2-6 Giron
Dan Evans almost slows down to walking pace - looks like he's switching his focus to the fourth set...
Marcos Giron holds to love and wins the third set.
Evans 6-4 7-6 (7-3) 2-5 Giron*
So Marcos Giron, to serve for the third set...
Dimitrov (*retired) 6-7 6-7 0-4 Popyrin
Bulgarian 15th seed Grigor Dimitrov has retired.
He was 6-7 6-7 0-4 down against Australian Alexei Popyrin on court five.
The winner of this tie between Dan Evans and Marcos Giron will play Popyrin in the third round.
Evans 6-4 7-6 (7-3) 2-5 Giron*
Just too good. Dan Evans saves the first but Marcos Giron picks the British number one off at the net with a superb, sweeping backhand winner. The American takes a double break in the third.
*Evans 6-4 7-6 (7-3) 2-4 Giron
And two more break points for Marcos Giron. This set is in danger of slipping away from Dan Evans.
*Evans 6-4 7-6 (7-3) 2-4 Giron
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
I was trying to figure out if Dan let that one bounce or caught it just before it did. I think he thought it was going wide but changed his mind!
*Evans 6-4 7-6 (7-3) 2-4 Giron
Giron leaps all over a short serve with a searing forehand return winner. He has his angles bang on during the next point too, forcing Evans low at the net and watching on as the Brit fails to pick up a backhand. 0-30.
*Evans 6-4 7-6 (7-3) 2-4 Giron
Dan Evans' new grip can't stop Marcos Giron racing to a love hold. The American remains a break to the good in the third set.
Evans 6-4 7-6 (7-3) 2-3 Giron*
Laura Robson
Former British number one on BBC Radio 5 Live Sports Extra
Even though Dan Evans is a break down, if he can connect with a couple of returns, I think he will be fine.
I almost expected a bit of a come down because he was so intense. It's hard to sustain that.
Evans 6-4 7-6 (7-3) 2-3 Giron*
Quick bit of courtside DIY for Dan Evans. He is re-gripping his racquet - takes some skill, like laying a carpet or applying wallpaper. He does it satisfyingly well.
Evans 6-4 7-6 (7-3) 2-3 Giron*
Fist pump from the 24th seed as he celebrates a welcome backhand into the net from his opponent, the next serve is big too and Dan Evans accelerates to 40-15 before taking the hold.
*Evans 6-4 7-6 (7-3) 1-3 Giron
Snappy hold for Marcos Giron from 0-15 down. He remains in front in the third set.
Evans 6-4 7-6 (7-3) 1-2 Giron*
Dan Evans has a little more zip in his game again now, jogging across the baseline after Marcos Giron prods into the tape. The British number one finds it himself on the next point and the American claws the game back in his favour. 40-15.
Evans 6-4 7-6 (7-3) 1-2 Giron*
A "come on now" from Dan Evans as he tries to gee himself up once more and it seems to work, clawing his way back to 30-30. He comes scuttling to the net, but has to stick the brakes on and leaves himself open to a passing effort from Marcos Giron - it drifts just wide, to Evans' relief!
The British number one takes an important hold.
*Evans 6-4 7-6 (7-3) 0-2 Giron
Dan Evans has completely faded in this third set. Marcos Giron is in control at a break to the good and now 0-30 on the Brit's serve.
*Evans 6-4 7-6 (7-3) 0-2 Giron
Bosh, huge ace from the American and he holds to consolidate that break a moment ago.
Evans 6-4 7-6 (7-3) 0-1 Giron*
Can Dan Evans break back immediately? He edges to 15-30 but Marcos Giron flings a serve out wide and the British number one can only jab it into the guts of the net. He wraps the next forehand into the gauze too. 40-30.
Evans 6-4 7-6 (7-3) 0-1 Giron*
Naomi Cavaday
BBC Sport tennis commentator
I'm not sure whether Evans has taken a sigh of relief after that second set but it feels like his energy has dropped off a touch.
Koepfer 3-4 Medvedev*
World number two Daniil Medvedev was broken back by German Dominik Koepfer but the Russian immediately responds with his second break of the set. He leads 4-3.