Postpublished at 00:04 British Summer Time 28 August 2019
*Potapova 6-3 2-6 1-2 Gauff
An easy one for Gauff, and she's taken a 2-1 lead off the back of her own serve.
The 15-year-old has taken control in this third set.
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 00:04 British Summer Time 28 August 2019
Gauff breaks!published at 00:00 British Summer Time 28 August 2019
Potapova 6-3 2-6 1-1 Gauff*
Potapova keeps hitting her shots into the net, and her frustration is coming out once again.
Gauff breaks to take it to one game apiece in the third set.
Postpublished at 23:59 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
Another impressive backhand which Potapova answers with a forehand, which is hit out.
Another break point for Gauff.
Postpublished at 23:58 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
Scratch that.
Deuce.
Postpublished at 23:58 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LivePotapova has just got a little bit tight on her last two forehands.
Postpublished at 23:58 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
Gauff hits a hard backhand straight at Potapova, who should produce one of her brilliant forehands.
Instead, it goes into the net.
Deja-vu as she does the same thing again to give Coco a break point.
Postpublished at 23:56 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveThat is an unbelievable point! She have to give credit to Potapova because she covered a lot of ground - as did Coco. But she has turned it back on and regrouped. This is an exciting final set.
Potapova breaks!published at 23:56 British Summer Time 27 August 2019
*Potapova 6-3 2-6 1-0 Gauff
What a rally that was!
Both the teens are stretching the other to their limits, but Potapova manages to come out on top with a stunning pick-up. Coco can only poke it into the cords on the stretch.
Postpublished at 23:54 British Summer Time 27 August 2019
Potapova 6-3 2-6 Gauff*
Two break points for Potapova.
Postpublished at 23:53 British Summer Time 27 August 2019
Potapova 6-3 2-6 Gauff*
Potapova seems to have found her voice again.
The Russian is getting vocal!
An 'indeliberate hindrance' is called as Potapova's visor obstructs her view. The point is replayed.
That doesn't happen often...
Postpublished at 23:51 British Summer Time 27 August 2019
Potapova 6-3 2-6 0-0 Gauff*
A combined age of 33.
These teenagers are giving this all they've got.
But who takes it?
It's time for the third set.
Gauff gets us under way.
Postpublished at 23:48 British Summer Time 27 August 2019
Potapova 6-3 2-6 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveIt's brilliant to watch someone at the age of 15 handling all the pressure around her. She keeps her emotions in check and figures out a way to get back into the match.
Postpublished at 23:47 British Summer Time 27 August 2019
Potapova 6-3 2-6 Gauff
Gigi Salmon
BBC TV at EastbourneThere's the crowd, there's the celebrations, the crowd are happy and we have a match on our hands.
Game and second set Gauffpublished at 23:47 British Summer Time 27 August 2019
*Potapova 6-3 2-6 Gauff
What a turnaround that is for Coco Gauff!
She's back in it and it's one set a piece, as a smash gives her the second set.
Postpublished at 23:46 British Summer Time 27 August 2019
*Potapova 6-3 2-5 Gauff
Potapova throws her racquet into the ground as she goes 30-0 down.
Coco then pulls off a stunning backhand and Potapova can only hit it into the net.
Three set points.
Postpublished at 23:45 British Summer Time 27 August 2019
*Potapova 6-3 2-5 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LivePotapova is trying to gather her thoughts. This game has swung away from her and she needs to bring herself back.
Postpublished at 23:44 British Summer Time 27 August 2019
*Potapova 6-3 2-5 Gauff
Potapova is serving to stay in the set.
Postpublished at 23:43 British Summer Time 27 August 2019
*Potapova 6-3 2-5 Gauff
Leon Smith
GB Davis Cup captain on BBC Radio 5 LiveThat's twice she has used the drop shot brilliantly. She's showing really good variety on the court.
Postpublished at 23:43 British Summer Time 27 August 2019
*Potapova 6-3 2-5 Gauff
A stunning drop shot from Coco Gauff to remind us why she's making headlines.
She's really into the swing of this now and is only one game away from taking the second set.
Postpublished at 23:41 British Summer Time 27 August 2019
Potapova 6-3 2-4 Gauff*
Potapova is trying to claw back some confidence by glancing over at her coach.
Out of the last 10 points, eight have gone in Coco's favour.