British wildcard Emma Raducanu retires when trailing Ajla Tomljanovic 6-4 3-0
Raducanu left court for medical attention at change of ends & did not return
Roger Federer beats Lorenzo Sonego 7-5 6-4 6-2 to make last eight
Top seeds Novak Djokovic & Ashleigh Barty through in straight sets
Fourth seed Alexander Zverev loses in five sets to Felix Auger-Aliassime
Wins for Angelique Kerber, Ons Jabeur & Aryna Sabalenka
Jonathan Jurejko
BBC Sport at Wimbledon
While it is not quite 'Cocomania' of 2019 vintage, there is still a passionate vocal backing for the American teenager.
One man implores her to keep fighting at deuce, then shouts 'Thank you!' when Gauff obliges with the ace.
Medvedev 6-2 Hurkacz
A clinical first set wrapped up in 30 minutes by Daniil Medvedev as the Russian coolly clinches it with a service game to love.
Gauff 4-6 2-3 Kerber*
A crucial hold for Gauff, who is able to avoid facing another awkward break point from deuce and keeps herself in contention at 2-3 in the second set.
*Gauff 4-6 1-3 Kerber
Tracy Austin
Two-time Grand Slam champion on BBC TV
This is a very uphill battle for Gauff if Kerber continues to play well.
It is really making Gauff feel uncomfortable.
*Gauff 4-6 1-3 Kerber
Kerber gets down to scoop a forehand back at Gauff from beneath her feet, and the crowd try to raise Gauff's spirits as Kerber battles back again for 30-30.
Gauff responds, to the delight of the crowd, but the German just isn't going anywhere. Deuce.
Jonathan Jurejko
BBC Sport at Wimbledon
"Let's go Coco!"
Strong American presence in the crowd on Centre Court.
Can't see too many Stars and Stripes around though.
With Independence Day celebrated yesterday - on Wimbledon's traditional Middle Sunday pause - it seems to have denied us the chance to see some patriotic Americans around the grounds.
*Gauff 4-6 1-3 Kerber
Angelique Kerber sticks to the task with a volley for 30-30, and Gauff is audibly frustrated as she misses on the following point.
Kerber holds, and the 2018 champion is edging closer to the quarter-final.
Gauff 4-6 1-2 Kerber*
Smiles around Court One greet another excellent point, as Coco Gauff places a drop shot that, try as she might, Kerber is never getting to.
A really good response from the young American.
Gauff 4-6 1-2 Kerber *
Chris Bradnam
BBC Sport commentator at Wimbledon
Pressure telling. Reaction in the crowd tells you who the favourite is for them... but Kerber is the favourite in this match.
Gauff 4-6 1-2 Kerber*
'Oohs' and Aahs' from the crowd as Angelique Kerber and Coco Gauff meet in the middle to battle out a superb point, and it's Kerber who comes out on top for 30-30.
The German then sets up break point - and this time she makes it count!
This is a big task for Gauff now.
Medvedev 5-2 Hurkacz
On court two, second seed Daniil Medvedev has twice broken the serve of Poland's Hubert Hurkacz - in the third and seventh games - and now has a chance to serve out the first set.
An impressive start to the match by the Russian.
Jonathan Jurejko
BBC Sport at Wimbledon
To nick that perhaps over-used phrase... this meeting between the teenage phenom and the former champion was always thought to be a "popcorn" match.
So far, it has been a worthy tag. The Centre Court fans, ready for a contest after the one-sided Djokovic win, are thoroughly enjoying themselves.
*Gauff 4-6 1-1 Kerber
Kerber is able to turn things around after a couple of Gauff errors. This is heating up nicely.
Gauff 4-6 1-0 Kerber *
Tracy Austin
Two-time Grand Slam champion on BBC TV
Kerber is deceptively quick and she has great anticipation that can make the court much smaller for the other player.
She relies on her wheels, just as Andy Murray does.
Gauff 4-6 1-0 Kerber*
And now it's Gauff's turn to ask some questions.
The American springs forward after a long baseline rally to set up break point.
Gaiff 4-6 1-0 Kerber *
Tracy Austin
Two-time Grand Slam champion on BBC TV
Really good court positioning by Gauff and keeping Kerber on the move by hitting so early.
Real battle of real-estate to push the other back.
Vital for Gauff to stop Kerber's momentum.
Gauff 4-6 1-0 Kerber*
What a game to get this second set started!
Gauff battles back from break point with the help of a couple of big serves to secure an important hold.
*Gauff 4-6 0-0 Kerber
Kerber leaps to nail a forehand down the line and take Gauff to deuce, and the German gets lucky as a shot from the baseline then clips the cord and leaves Gauff with no hope of beating the bounce.
Break point, but Gauff rescues the situation with a superb point - sending her opponent on the run before Kerber nets.
*Gauff 4-6 0-0 Kerber
A whipped forehand winner gets Coco Gauff on the board at 15-15, but a sweet hit from Angelique Kerber puts the American on the back foot.
Gauff keeps calm, and a winner off the backhand sets up game point.
*Gauff 4-6 0-0 Kerber
Five games in a row on serve at the end of a first set that started with five breaks in a row.
An enthralling battle. Coco Gauff gets us back under way.