Shelton holds to lovepublished at 16:47 British Summer Time 7 July
*Sinner 6-2 4-3 Shelton
Ben Shelton seems to have found his groove on serve now.
He holds to love for the first time.
Summary
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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Shelton holds to lovepublished at 16:47 British Summer Time 7 July
Postpublished at 16:46 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 7-5 Humbert
Ugo Humbert deserves huge credit for his performance.
He was more than a match for the defending champion for the majority of the match and rightly received a very warm ovation from the crowd as he left Centre Court.
Media caption, Humbert wins the third set
Postpublished at 16:45 British Summer Time 7 July
Jonathan Jurejko
BBC Sport at Wimbledon"Come on EM-MAAAA!"
Carlos Alcaraz hasn't even started his on-court interview and the locals on Centre Court are already shouting for the home favourite...
Not long to wait, guys.
Reckon Raducanu and Lulu Sun will be walking out about 10 minutes after Alcaraz finishes his chat with Annabel Croft.
Sinner holds to lovepublished at 16:45 British Summer Time 7 July
Sinner 6-2 4-2 Shelton*
Jannik Sinner is just so ruthless on serve as he holds to love for the fourth time.
Postpublished at 16:44 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 7-5 Humbert
This was Carlos Alcaraz towards the end of the first set when he was looking pretty much unstoppable.
Well, at times in the next three Ugo Humbert looked like he might just stop the 21-year-old.
But Alcaraz's best form returned in the nick of time late in the fourth set.
Media caption, Alcaraz wins point with brilliant forehand
Shelton holdspublished at 16:42 British Summer Time 7 July
*Sinner 6-2 3-2 Shelton
Jannik Sinner is almost able to conserve energy on his own service games as he rattles through them so quickly and that gives him the opportunity to turn up the pressure when Ben Shelton has the ball in hand.
Shelton gets over the line this time.
Postpublished at 16:40 British Summer Time 7 July
Sinner 6-2 3-1 Shelton*
Charlotte Coates
BBC Sport at WimbledonI was here yesterday to watch Ben Shelton come through his match with Denis Shapovalov and he had a number of friends sat near me.
Those same friends are here again now but they’re rather subdued at the moment.
Sinner holdspublished at 16:40 British Summer Time 7 July
Sinner 6-2 3-1 Shelton*
Even when the net cord comes to Ben Shelton's aid, nudging the ball over, Jannik Sinner still finds a way to adjust and slot a winner in at the baseline. 15-0.
Shelton starts to look a little ragged as he charges across the baseline before sending a forehand long. 40-0.
Sinner gets a little sloppy to let Shelton on the board - just the fourth point he has conceded on serve.
The Italian gets another comfortable hold.
'Humbert deserves a lot of credit'published at 16:37 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 7-5 Humbert
Tim Henman
Former British number one on BBC TVUgo Humbert deserves a lot of credit, he fought from the first point to the last.
It was mighty, mighty close.
I think Carlos Alcaraz will leave the court a relieved man after today.
Game, set and match - Alcarazpublished at 16:36 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 7-5 Humbert
Carlos Alcaraz is into the last eight after a real battle against 16th seed Ugo Humbert.
The third seed was on top form to take the first set but was then pushed all the way for the next three by the French number one.
Humbert broke him four games in a row at one point but Alcaraz rallied again and finished the match in style.
The Spaniard's title defence continues.
Media caption, Alcaraz seals victory
Shelton holdspublished at 16:35 British Summer Time 7 July
*Sinner 6-2 2-1 Shelton
Image source, Getty ImagesAnd Ben Shelton knows how important it is to hold as he fires an ace to lay down a marker from the outset.
It has to be so disheartening for Shelton to serve at 137mph only to see Jannik Sinner return for a winner. 30-30.
Shelton shrugs it off and finds another ace to hold for the first time since game three of the first set.
Two match pointspublished at 16:35 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 6-5 Humbert*
What a time to produce a drop shot as good as that.
Carlos Alcaraz with nerves of steel and a touch to die for to bring up two match points.
Postpublished at 16:33 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 6-5 Humbert*
Carlos Alcaraz nets a backhand, it's 0-15 and Ugo Humbert gestures to the crowd to make some more noise.
Centre Court responds. Humbert is determined to provide another twist in this match.
Postpublished at 16:33 British Summer Time 7 July
Alcaraz 6-3 6-4 1-6 6-5 Humbert*
Tim Henman
Former British number one on BBC TVIt's the fine margins that tip matches into Carlos Alcaraz's favour.
Postpublished at 16:32 British Summer Time 7 July
Sinner 6-2 2-0 Shelton*
Charlotte Coates
BBC Sport at WimbledonGasps from the crowd as Jannik Sinner whacks down a couple of aces. The world number one looks untouchable right now.
Shelton holdspublished at 16:32 British Summer Time 7 July
Sinner 6-2 2-0 Shelton*
Even the basics aren't there for Ben Shelton at the moment. He sends a simple forehand long and looks up to his father and coach Bryan for some encouragement.
Jannik Sinner loses clear sight of the ball as he attempts an overhead volley and it's straight into the net. 30-30.
An ace to hold and that's seven games in a row now for Sinner.
Shelton desperately needs to halt this run and with a hold in the next game.
Alcaraz breaks, will serve for the matchpublished at 16:32 British Summer Time 7 July
*Alcaraz 6-3 6-4 1-6 6-5 Humbert
That missed smash is a huge moment in the set - and the match.
Ugo Humbert then makes a misjudgement at break point, leaving a forehand from Carlos Alcaraz that has a huge amount of top spin on it and dips late to clip the line.
The defending champion will serve for a place in the quarter-finals.
Image source, ReutersPostpublished at 16:30 British Summer Time 7 July
*Alcaraz 6-3 6-4 1-6 5-5 Humbert
Two break points.
Carlos Alcaraz just keeps the point alive and Ugo Humbert goes long with the overhead smash.
Postpublished at 16:29 British Summer Time 7 July
*Alcaraz 6-3 6-4 1-6 5-5 Humbert
Carlos Alcaraz is heating up...
On the run he crunches a forehand down the line for another winner.
It's 0-30 on the Ugo Humbert serve.
'Humbert wants a fifth set'published at 16:29 British Summer Time 7 July
*Alcaraz 6-3 6-4 1-6 5-5 Humbert
Tim Henman
Former British number one on BBC TVIt hasn't been easy for Carlos Alcaraz on his own serve.
Ugo Humbert has enjoyed his time on Centre Court and you feel like he really wants a fifth set.