Postpublished at 21:01 British Summer Time 3 July 2019
*Gauff 6-3 3-2 Rybarikova
But back comes Rybarikova. The former top-20 player takes the game to deuce after dictating the point.
Summary
Teenage qualifier Coco Gauff, 15, through to Wimbledon third round
American beats Magdalena Rybarikova 6-3 6-3 under new Court One roof
Men's champion Novak Djokovic crushes Denis Kudla 6-3 6-2 6-2
GB's Kyle Edmund loses in five sets to Fernando Verdasco
Heather Watson loses 7-5 6-1 to Anett Kontaveit
Postpublished at 21:01 British Summer Time 3 July 2019
Postpublished at 21:00 British Summer Time 3 July 2019
*Gauff 6-3 3-2 Rybarikova
This time the Slovak comes out on top of a rally as Gauff launches a angled forehand into the net.
30-30.
Rybarikova then takes her eye off the ball - not literally - and hits a weak return that is long.
Postpublished at 20:59 British Summer Time 3 July 2019
*Gauff 6-3 3-2 Rybarikova
Gauff produces a great disguised backhand drop with spin, but Rybarikova reads it like someone catching the destination on the front of a moving train.
Excellent.
0-15.
Gauff is having none of this.
30-15.
Postpublished at 20:57 British Summer Time 3 July 2019
*Gauff 6-3 3-2 Rybarikova
Chris Bradnam
BBC Sport commentator at WimbledonA terrific hold. Rybarikova hangs in this second set and the match.
Postpublished at 20:57 British Summer Time 3 July 2019
*Gauff 6-3 3-2 Rybarikova
Much better from Rybarikova, who again comes out on top after coming to the net.
She then smacks down an ace.
That was probably the world number 139's best game so far.
Image source, Getty ImagesPostpublished at 20:55 British Summer Time 3 July 2019
Gauff 6-3 3-1 Rybarikova*
Credit to Rybarikova - she saves both.
Deuce.
Postpublished at 20:55 British Summer Time 3 July 2019
Gauff 6-3 3-1 Rybarikova*
Magdalena Rybarikova tries something different with a disguised drop-shot but the ball floats into the net.
Two break points.
Postpublished at 20:54 British Summer Time 3 July 2019
Gauff 6-3 3-1 Rybarikova*
You know when you're playing a computer game and take on the computer on the hardest setting. Gauff is the hardest setting.
15-30.
Postpublished at 20:53 British Summer Time 3 July 2019
Gauff 6-3 3-1 Rybarikova*
A great serve into the body.
Advantage.
A double-handed backhand with plenty of whip.
Game.
If that was Gauff in trouble...
Image source, Getty Imagesget involved Get Involvedpublished at 20:51 British Summer Time 3 July 2019
#bbctennis or text 81111 (UK only)
Jeanna Louise Skinner: I want to be Coco Gauff when I grow up. I'm 42.
Jon Gibbon: Anyone who thought Coco Gauff couldn't live up to the hype is being proved wrong. Great first set from the 15 year old. The depth on her shots is top notch.
Sarah Williams: Coco Gauff is ridiculous. When I was 15 I was just happy to be reasonably good at Mario Kart.
Postpublished at 20:51 British Summer Time 3 July 2019
*Gauff 6-3 2-1 Rybarikova
She responds with an ace, in the way Serena, Roger and the like do when they're in a small spot of bother.
40-30.
Rybarikova hits back by coming to the net and taking the game to deuce.
Postpublished at 20:50 British Summer Time 3 July 2019
*Gauff 6-3 2-1 Rybarikova
Coco Gauff goes 30-0 up on her serve... and then goes long with a forehand. The crowd look shocked.
She then double-faults - probably her biggest weakness so far.
30s each.
Gauff breakspublished at 20:48 British Summer Time 3 July 2019
*Gauff 6-3 2-1 Rybarikova
Rybarikova goes for Hollywood in order to get the better of her precocious opponent.
An error message flashes up in front of her eyes as she goes long with a forehand.
Broken.
Hard to fix.
Media caption, Gauff breaks in second set
Postpublished at 20:46 British Summer Time 3 July 2019
Gauff 6-3 1-1 Rybarikova*
This is ridiculous. From a flat baseline rally Gauff changes to sliced backhand which outfoxes the server.
Two break points.
Image source, Getty ImagesPostpublished at 20:45 British Summer Time 3 July 2019
Gauff 6-3 1-1 Rybarikova*
Rybarikova yet again produces an error on a rally as she finds the net with a forehand from the back.
It's 0-30 on the 30-year-old's serve.
Image source, EPAPostpublished at 20:44 British Summer Time 3 July 2019
Gauff 6-3 1-1 Rybarikova*
Every shot that Coco Gauff produces seems to be measured. She rarely throws herself at any ball, there aren't any grunts or groans etc
Machine-like.
She holds. Another game in the bag.
Postpublished at 20:41 British Summer Time 3 July 2019
*Gauff 6-3 0-1 Rybarikova
Coco Gauff launches another Magdalena Rybarikova serve towards the roof. This time she hits the new structure on Court One.
You see, she's even good at that.
The Slovak former semi-finalist holds. That should do her a lot of good after that first set battering.
Postpublished at 20:40 British Summer Time 3 July 2019
Gauff 6-3 0-0 Rybarikova*
It seems that Gauff is coming out on top of many of the rallies. This one lasts 14 shots.
30-15.
30-30.
Postpublished at 20:39 British Summer Time 3 July 2019
Katie Falkingham
BBC Sport at WimbledonPeople jumped to their feet as Gauff sealed the first set. The acoustics from the roof will have helped, but it was LOUD.
The American looks totally at home on the green grass of Wimbledon. This is her arena.
Image source, Getty ImagesPostpublished at 20:38 British Summer Time 3 July 2019
Gauff 6-3 0-0 Rybarikova*
Much better from Magdalena Rybarikova - a good serve that sends Coco Gauff out wide before coming in and nailing the winner.
30-0.