If you are just joining us, there has already been plenty of action around the grounds.

Defending champion Alfie Hewett got his Wimbledon campaign off to a flying start, with the second-seeded Briton defeating Spain's Daniel Caverzaschi in straight sets in under an hour.

He will now face Zhenxu Ji of China in the quarter-finals.

Take a look how Hewett got the defence of his men's wheelchair singles title under way...

A third ace of the match seals another service hold for Taylor Fritz, who has raced into a 3-0 lead.

Surely any early nerves that might have been present will have been settled by that fast start.

John McEnroe
Three-time Wimbledon singles champion on BBC Radio 5 Live's '6-Love-6'

Norrie has got to stick with it in terms of his concentration, and hope Alcaraz has a few lapses in concentration. My brother puts it in a nice way about Alcaraz - he can hit himself out of trouble but he can also hit himself into trouble.

Image source, EPA

Karen Khachanov goes long and that's an early break of serve for Taylor Fritz.

Given how well the American has been serving in this tournament, that might already be a pivotal moment in this first set.

Karen Khachanov is given the runaround early in his first service game but is rewarded for his efforts by reaching a Taylor Fritz drop shot and angling it over the net for a winner.

Moscow-born Khachanov is always playing catch-up though and is facing a break point...

Simon Reed
BBC commentator on BBC iPlayer

We could be in for a long ride here. Both have big serves, you can see that from their ace counts.

Fritz has a little bit more variety in his game and his forehand down the line is a really impressive shot. That first game will settle his nerves.

Jess Anderson
BBC Sport at Wimbledon

People were so enthralled with Carlos Alcaraz and Ben Shelton that they didn’t clock Cam Norrie has just arrived!

He’s up against Alcaraz on Centre Court later today.

There’s a feeling among the fans on court 16 that they have seriously hit the jackpot.

Image source, BBC Sport

A hold to 15 to start for Taylor Fritz, who has lost both of his previous Tour-level meetings against Karen Khachanov.

These two have never met in a Grand Slam before, though.

*denotes server

Gary Rose
BBC Sport at Wimbledon

There was quite a breeze whipping around Court One yesterday but it is much calmer today, a little cool but sunshine and blue skies - perfect conditions for some tennis.

Taylor Fritz will certainly appreciate them because he had to come through five sets in each of his first two matches here right when the temperatures were at their hottest.

He should be pretty fresh for today after his opponent Jordan Thompson retired in their last-16 match.

John McEnroe
Three-time Wimbledon singles champion on BBC Radio 5 Live's '6-Love-6'

John was asked on Monday if this is best chance for a fellow American to reach the final and possibly win Wimbledon:

I think the answer is yes. I think Fritz is going to beat Khachanov even though he has a losing record against him. Ben Shelton will look at Sinner and think he has something.

Would I pick those two right now? No - I would stick with the top guns, but stranger things have happened.

I think they have the best chance to win at the US Open [out of the four majors] because they would get the crowd support they need.

I think Shelton is the most likely to win one, but Fritz is the most solid - he is the least likely to be beat by himself.

Jess Anderson
BBC Sport at Wimbledon

Court 16 very quickly filled up as word has spread that Carlos Alcaraz is out here practising.

He's actually hitting with American Ben Shelton, who notably is a leftie, like Alcaraz’s opponent later today Cam Norrie.

What a thing to stumble on.

Gary Rose
BBC Sport at Wimbledon

Image source, Getty Images

Americans have been starved of a male Grand Slam winner, with the man most recently winning one being Andy Roddick in 2003.

At Wimbledon you have to go back even further, with Pete Sampras triumphing in 2000.

A whole generation of Americans have grown up without seeing a men's Grand Slam champ, so could this be the year that changes, with two Americans into the quarter-finals?

"I hope so," says American former world number 11 Sam Querrey. "But if I had to throw a wager on it I can't see it with Sinner, Djokovic and Alcaraz."

Should Taylor Fritz win this match then he's likely going to have to see off two of those giants of the game to win his first Grand Slam title.

Image source, Getty Images

Taylor Fritz and Karen Khachanov are both seeking untrodden ground this afternoon - neither has reached the semi-final at Wimbledon before.

Fritz is one of two Americans in the last eight, along with Ben Shelton, who beat Italian Lorenzo Sonego on Monday.

Khachanov, meanwhile, is trying to break another barrier - he's never beaten a top-five player in a Grand Slam in 10 previous attempts.

Fritz is fifth in the world rankings as things stand, although a win will take him into the top four above British number one Jack Draper.

The two players are going through their warm-ups on Court One and should be getting under way in a couple of minutes.

Here's a rundown of what happened on day eight of the Championships:

• Grigor Dimitrov retired with a two-set lead against world number one Jannik Sinner after sustaining a pectoral muscle injury.
• Seven-time champion Novak Djokovic came from a set down to beat Australia's Alex de Minaur.
• The Serb will next face Italy's Flavio Cobolli, who overcame Croatia's Marin Cilic in four sets.
• Men's 10th seed Ben Shelton beat Lorenzo Sonego in four after losing the first set to the Italian.
• Five-time Grand Slam champion Iga Swiatek reached the quarters for the second time after a straight-set win against Denmark's Clara Tauson.
• Russian teenager Mirra Andreeva beat America's Emma Navarro in straight sets on her Centre Court debut to progress to the quarter-finals.

Image source, Getty Images

We're really getting towards the serious end of the Championships now.

Tuesday marks the start of the quarter-final stage in the singles.

Here's a look at what's to come today:

Centre Court

• Aryna Sabalenka v Laura Siegemund (13:30 BST)
• Cameron Norrie v Carlos Alcaraz

Court One

• Taylor Fritz v Karen Khachanov (13:00 BST)
• Amanda Anisimova v Anastasia Pavlyuchenkova

Image source, Getty Images

As the days wear on, the field of Brits left in the competition is thinning out.

But two British men have massive days ahead of them.

Cameron Norrie faces defending champion Carlos Alcaraz in the men's quarter-finals on Centre Court, while Joe Salisbury partners Brazil's Luisa Stefani in the mixed doubles semis.

In the men's wheelchair singles, defending champion Alfie Hewett has already booked his place in the second round with a straight-set win and Gordon Reid is looking to join him, he's in action against Belgium's Joachim Gerard right now on court three.

Lucy Shuker will follow Reid, she plays Diede De Groot in the first round of the women's wheelchair singles.

Image source, Getty Images

We've reached the business end of the tournament now.

It's the first quarter-final day at Wimbledon and for all the 'one match at a time' talk, surely every player left in the singles draws has allowed themselves to think about walking out on Centre Court this weekend - even if just for a second?

Among them is this year's last British hope, Cameron Norrie. He is up against defending champion Carlos Alcaraz in the day's second match on Centre.

First up, though, it's women's top seed Aryna Sabalenka against Laura Siegemund of Germany. That starts at 13:30 BST and we'll be building up to that very shortly.

Meanwhile, the men's quarters start on Court One with fifth seed American Taylor Fritz playing 17th seed Karen Khachanov - and they're due to walk out any moment now.

Image source, Getty Images

Great Britain's Alfie Hewett is through to the second round of the wheelchair singles with a straight-set win over Spain's Daniel Caverzaschi.

The defending champion took the first set 6-1 before breaking Caverzaschi early in the second set and going on to secure it 6-2 to seal victory.

He will play either Tom Egberink or Zhenxu Ji in the next round - they are currently playing a deciding set on court 17.

Fellow Briton Gordon Reid is just about to start his first-round match against Belgium's Joachim Gerard on court three, which you can watch via the stream at the top of this page.

Alfie Hewett and Gordon Reid were watching the Wimbledon action from the Royal Box on Saturday but now it is their turn to take to the court to defend their titles.

Hewett, 27, won the wheelchair men's singles title for the first time last year, while he and fellow Briton Reid claimed the men's wheelchair doubles title for the sixth time.

Hewett has just begun his title defence on court three against Spain's Daniel Caverzaschi - and you can watch it live at the top of this page (UK only).