Postpublished at 00:29 British Summer Time 28 August 2019
*Potapova 6-3 2-6 3-4 Gauff
What a backhand! Amazing!
Coco has got a break point.
Summary
American 15-year-old Coco Gauff beats Russian teenager Anastasia Potapova 3-6 6-2 6-4 in US Open first round
British number one Kyle Edmund loses 3-6 7-6 (7-1) 7-5 5-7 6-2 to Spain's Pablo Andujar in the US Open first round
Top seed and defending champion Naomi Osaka comes from behind to beat Russia's Anna Blinkova in her opener
Three-time US Open champion Rafael Nadal faces Australia's John Millman at 00:00 BST
Wimbledon champion Simona Halep beats Nicole Gibbs
Use audio icon at the top of the page for BBC Radio 5 Live Sports Extra commentary
Postpublished at 00:29 British Summer Time 28 August 2019
Postpublished at 00:28 British Summer Time 28 August 2019
*Potapova 6-3 2-6 3-4 Gauff
Oh Coco. Stop that!!
What a rally that was.
Gauff waited, and the shot was worth the wait.
She finishes with a backhand to go 30-15 up.
Postpublished at 00:27 British Summer Time 28 August 2019
Potapova 6-3 2-6 3-4 Gauff*
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveIf you are outside the sidelines just go back across court and make your opponent play the ball.
Postpublished at 00:26 British Summer Time 28 August 2019
Potapova 6-3 2-6 3-4 Gauff*
A fabulous backhand from Gauff, as Potapova replies with a forehand which goes out.
Gauff undoes her hard work, though, and it's back to 15-15.
Potapova breaks back!published at 00:24 British Summer Time 28 August 2019
*Potapova 6-3 2-6 3-4 Gauff
She's broken right back after a third double-fault in the same game from Coco. THREE.
What a turnaround!
Nervy?
Postpublished at 00:23 British Summer Time 28 August 2019
Potapova 6-3 2-6 2-4 Gauff*
Two break points now for Potapova as Gauff hits her shot into the net.
Postpublished at 00:22 British Summer Time 28 August 2019
Potapova 6-3 2-6 2-4 Gauff*
Make that back-to-back double-faults.
Postpublished at 00:22 British Summer Time 28 August 2019
Potapova 6-3 2-6 2-4 Gauff*
We haven't seen one in a while, and that right there was Coco's first double-fault of the set.
Postpublished at 00:21 British Summer Time 28 August 2019
*Potapova 6-3 2-6 2-4 Gauff
Gigi Salmon
BBC TV at EastbournePotapova has to hang on in there and keep asking questions of her 15-year-old opponent.
Postpublished at 00:21 British Summer Time 28 August 2019
Potapova 6-3 2-6 2-4 Gauff*
Potapova battles through her injury and manages to claw it back to 4-2.
This is far from over!
Postpublished at 00:19 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveThat was slow. Really slow! She is legitimately having some shoulder issues. And at 4-1 down the pain is worse.
Postpublished at 00:18 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
So, let's see how this injury pans out. Potapova is right-handed after all, and it's her right shoulder that's causes her some issues.
She's currently 30-0 down.
Postpublished at 00:17 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Potapova's medical time out is over. She's back on her feet and ready to go.
Let's do this.
Postpublished at 00:16 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Potapova doesn't look like a happy bunny right now.
Gauff, meanwhile, is on the sideliness jumping up and down, raring to crack on.
Mind games?
Postpublished at 00:16 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveCoco is jumping around, doing the right thing by filling the time - doing up her shoe laces and things like that.
Postpublished at 00:15 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Medical time out now for Potapova as we head into the closing stages.
She seems to be struggling with her right arm and shoulder.
Postpublished at 00:12 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-4 Gauff
Four games in a row for Gauff!
She's won eight of the last nine and she's now 4-1 up in the third set.
Potapova has completely crumbled - she's now also called her trainer out.
Postpublished at 00:11 British Summer Time 28 August 2019
Potapova 6-3 2-6 1-3 Gauff*
One hour and 34 minutes on the clock.
Gauff is 40-15 up and the match is within her sights.
Gauff breaks!published at 00:10 British Summer Time 28 August 2019
Potapova 6-3 2-6 1-3 Gauff*
Coco Gauff extends her lead to 3-1 with a hard-hitting forehand which silences Potapova.
The Russian can't reach it and Gauff screams as she breaks the 18-year-old.
Postpublished at 00:09 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-2 Gauff
What a fantastic rally!
Coco Gauff is on top form. She's cool, calm and collected.
Backhand, forehand, backhand, forehand, net.
Break point Gauff.