Defending champion Carlos Alcaraz beats Ugo Humbert 6-3 6-4 1-6 7-5
World number one Jannik Sinner beats Ben Shelton 6-2 6-4 7-6 (11-9)
Women's second seed Coco Gauff knocked out in 6-4 6-3 defeat by Emma Navarro
Jasmine Paolini progresses to quarter-finals after Madison Keys retires injured
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*Sinner 3-2 Shelton
Jannik Sinner couldn't convert his break point in Ben Shelton's previous service game but he makes it count this time.
A big moment in this first set, especially with how strong Sinner has been on serve.
Image source, PA MediaAlcaraz 6-3 6-4 1-6 3-4 Humbert*
Tim Henman
Former British number one on BBC TV
Ugo Humbert has played fantastically well.
He is 26 years of age so that's in the middle of his career but it takes some players a little bit longer to understand their game and grow on the tour.
He has responded well in the fourth and is now up 4-3. The pressure is on Carlos Alcaraz.
Alcaraz 6-3 6-4 1-6 3-4 Humbert*
Incredible point and the crowd are on their feet on Centre Court.
Back and forth they go before Ugo Humbert charges in to get to a drop shot, whipping the ball past Carlos Alcaraz for a winner.
*Alcaraz 6-3 6-4 1-6 3-4 Humbert
Ugo Humbert holds to 15 and edges ahead in the set.
It's still on serve but the way he's been returning, Humbert will fancy his chances of getting another break.
For the second match running, Carlos Alcaraz is being properly tested.
Image source, ReutersSinner 2-2 Shelton*
Todd Woodbridge
Former Wimbledon doubles champion on BBC Two
That’s the second time Shelton has gone with a dropshot, but his technique gives it away. You can actually see him make a grip change, Sinner saw that and was on top if it right away.
Sinner 2-2 Shelton*
Ben Shelton's drop shots just aren't working.
Jannik Sinner spots a grip change from the American and gets to the net in quick-fashion to slam it back for a winner. 30-0.
A slip from Sinner beyond the baseline sees him return into the net. 30-30. There was a little look down at his left ankle after that - one to keep an eye on.
*Alcaraz 6-3 6-4 1-6 3-3 Humbert
Tim Henman
Former British number one on BBC TV
Ugo Humbert's return of serve has been absolutely exceptional. He is taking it so early.
He has been so aggressive, breaks back for the second time in this fourth set.
Alcaraz 6-3 6-4 1-6 3-3 Humbert*
Ugo Humbert applauds as Carlos Alcaraz makes a very tricky drop-volley look easy.
But then roars in celebration after thumping a backhand past Alcaraz to bring up break point.
And the 16th seed takes it! A powerful return and Alcaraz's backhand hits the net.
The defending champion has been broken in five of his last six service games...
Sinner 2-2 Shelton*
Jannik Sinner set the tone on his first service game and he's not easing off.
A second hold to love for the Italian.
Alcaraz 6-3 6-4 1-6 3-2 Humbert*
Here we go again. Ugo Humbert is up 0-30 on the Carlos Alcaraz serve...
*Sinner 1-2 Shelton
That call is now looking very wise from Ben Shelton as he fights back to deuce and then earns advantage.
Now it's Jannik Sinner who challenges after his forehand is deemed wide.
Sinner isn't successful and Shelton holds.
*Sinner 1-1 Shelton
Ben Shelton attempts a drop shot put Jannik Sinner is so good at sliding on this grass, he uses those long legs to get to the net and fires down the line for a 30-15 lead.
Sinner has a first look at break point as he deals so well with Shelton's 136mph serve and forces an error from the American.
Shelton's backhand is called out but he challenges the call and... it's successful!
It's overturned and they will replay the point.
Image source, Getty Images*Alcaraz 6-3 6-4 1-6 3-2 Humbert
Just in case the thought that he might now run away with this set had crossed Carlos Alcaraz's mind, Ugo Humbert quickly helps him move past such a notion.
The Frenchman holds to love but remains a break down.
Alcaraz 6-3 6-4 1-6 3-1 Humbert*
After being broken four games in a row, Carlos Alcaraz holds serve to keep himself ahead in this fourth set.
There is a shout of celebration after an ace takes him to 40-15 but he is calmness personified after a chip-and-charge followed by a smart volley wrap up the game.
Sinner 1-1 Shelton*
It all seemed so easy for Ben Shelton on serve but now he's getting the run around from world number one Jannik Sinner.
Shelton sprints left to hook it back from the baseline, then it's right to return at full stretch but Sinner eventually wraps up the point with a fearsome volley. 15-0.
Sinner was not broken once in his straight set win against Miomir Kecmanovic and you can see why. He holds to love.
*Alcaraz 6-3 6-4 1-6 2-1 Humbert
Tim Henman
Former British number one on BBC TV
Carlos Alcaraz doesn't doubt himself on too many occasions, especially when he is up two sets to one.
Hijikata/Peers 4-6 1-1 Skupski/Venus*
Play is back under way on the outside courts and there's good news for the Brits.
Neal Skupski and his men's doubles partner Michael Venus of New Zealand are a set to the good in their second-round tie against Australians John Peers and Rinky Hijikata, who you'll remember knocked out Andy and Jamie Murray on Thursday.
Skupski and Venus won the opener 6-4, while the second set remains on serve.
*Alcaraz 6-3 6-4 1-6 2-1 Humbert
We've got a real tussle on our hands now on Centre Court.
Two breaks of serve to start the fourth set and Carlos Alcaraz has another chance to break.
And he takes it... well, he was handed it on a platter as Ugo Humbert double faults.
Still no one can hold serve in this fourth set.
Image source, Getty Images*Sinner 0-1 Shelton
Ben Shelton fires down the middle at 130mph for the first ace of the match and follows with a second to take the first service game to 15.
He's still in the early stages of his career but is already accustomed to featuring in the latter stages of Grand Slams.
No signs of nerves here.
Sinner v Shelton
Off we go on Court One for the second match of the day.
Ben Shelton won the toss and has chosen to serve first.