It wouldn't be Wimbledon without drama - and boy have we had plenty today.

Novak Djokovic came from behind to keep his quest to equal Roger Federer's Wimbledon title haul alive.

And Russian teenager Mirra Andreeva kept her remarkable run going by reaching the quarter-finals.

But the enduring memory will, sadly, be that of a tearful Grigor Dimitrov who appeared set for a sensational upset of world number one Jannik Sinner until injury intervened.

We'll be right back here on Tuesday morning to capture day nine of these captivating Championships. See you then.

Jonathan Jurejko
BBC Sport senior tennis reporter at Wimbledon

Poor Grigor Dimitrov. Unfortunately, retiring injured is a regular pattern for the 34-year-old Bulgarian.

Dimitrov has been forced to quit 12 times since the start of the 2021 season, more than any other player on the ATP Tour.

Remarkably, he has now seen each of his past five Grand Slam appearances ended by injury.

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 tomorrow.

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

What an incredible end to the second Monday at Wimbledon it's been.

If you missed it, where were you?

No worries, we've got you covered. Here's a rundown of what happened on day eight of the Championships.

• Grigor Dimitrov retires with a two-set lead against 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 face Italy's Flavio Cobolli after he overcame Croatia's Marin Cilic in four sets
• 10th seed Ben Shelton beat Lorenzo Sonego in four after losing the first set to the Italian
• Five-time Grand Slam champion Iga Swiatek is through to the quarters for the second time after a straight-sets 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

Tracy Austin
Two-time Grand Slam champion on BBC One

Grigor Dimitrov was really serving well. In the past, he has had service yips where he hasn't been able to get the right smooth motion. However, he has been serving well and moving well.

It is also his ability to hit so well on the move, he has a great feel at the net, he has an ability to anticipate shots.

There aren't that many players anymore that are so comfortable at playing in the forecourt. There are also not that many players that have his wonderful backhand slice, which is a weapon.

He has so many ways to win points and it all seemed like it was coming together.

Tracy Austin
Two-time Grand Slam champion on BBC One

Image source, PA Media

How well Grigor Dimitrov was playing is the hard part. You know that his game matches up so well on this surface. He has that ability to hit a heavy slice that stays down so low.

The fact that it was one serve that did it for him is the hard part. This is a man who has put his heart and soul into this sport. He works so hard and he is so fit. He crosses all the t's and dots all the i's.

It all happened on one shot. He must be so desperately disappointed because somewhere in his thoughts will have been that he was two sets up and Jannik Sinner isn't playing his best tennis.

More from Jannik Sinner on BBC One after his walkover win against the injured Grigor Dimitrov:

"I don't take this as a win at all, this is just an unfortunate moment for us to witness.

"He has struggled in Grand Slams with injuries a lot so seeing him again with this injury is very tough. We all saw by his reaction how much he cares about the sport and he is one of the hardest working players on tour.

"Thank you for coming, but this is not the end we wanted to see and it's very sad. We all wish him only the best - let's give an applause for him and his team."

Image source, Getty Images

Jannik Sinner spoke courtside after Grigor Dimitrov was forced to retire in their fourth round match: "I don't know what to say. He is an incredible player and we all saw this today.

"He has been so unlucky in the past couple of years. He is an incredible player who is a good friend of mine. We understand each other very well off the court.

"Seeing him in this position - if there was a chance for him to be in the next round he would deserve it. I hope he has a speedy recovery."

A look at the stats shows just why Grigor Dimitrov has such reason to be absolutely devastated by that freak injury he suffered.

Not only had he matched the world number one - he outplayed him in many parts of the match.

Unfortunately the Bulgarian's huge serve - powering down 14 aces - proved to be his ultimate undoing, with what appears, to our untrained eye, to be an injury to his pectoral muscle.

Tim Henman
Former British number one on BBC One

Grigor Dimitrov played a brilliant two sets to be up against the world number one, but then in the blink of an eye his body failed him. He had no opportunity to continue.

It will be a strange emotion for Jannik Sinner, who will go through to the quarter-finals.

Image source, Getty Images

Andrew Cotter
Commentator on BBC One

Sport can be beautiful but it can also be horribly cruel at times.

Centre Court rise to Grigor Dimitrov as if he won the championship because they feel such sympathy.

Jannik Sinner is spared only really by the cruel fate of sport. An extraordinary end to this match.

After escorting his devastated opponent to the dressing rooms, Jannik Sinner is back on Centre for his post-match on-court interview.

As he did at the time of the injury, the world number one seems almost as disconsolate as Grigor Dimitrov. Not the way any sportsperson wants to win.

Jonathan Overend
BBC Radio 5 Live commentator

Grigor Dimitrov has been through so much over the last few years.

He has had to retire from the last four Grand Slams, including Wimbledon last year where he retired at this same stage against Daniil Medvedev.

This is one of the most shocking scenes I've seen in a sporting arena in recent times, just because of how sudden it was.

A tearful Grigor Dimitrov cannot continue.

The Bulgarian receives a standing ovation from Centre Court as he and Jannik Sinner depart side by side.

That will be of little consolation to the 34-year-old, who had the world number one exactly where he wanted him, only for fate to intervene.

Image source, Getty Images

Greg Rusedski
Former British number one on BBC Radio 5 Live and BBC Sounds

Dimitrov is playing the tennis of his life.

We didn't see this coming whatsoever. This is not the way we want this match to end.

He is holding his pectoral muscle which is a chest muscle, so let's hope he can find a solution because we don't want to see this happen right now.

Grigor Dimitrov is rubbing his eyes, maybe to try to hold back tears of pain or sadness.

Jannik Sinner is over, kneeling at the changeover point, and conversing with his opponent.

We're going to have a medical time-out in the hope the trainers can somehow work muscle magic.

Image source, Getty Images

The Bulgarian looks in real pain. It's really difficult to see how he can continue, judging by his body language.

Two sets up against the world number one, what horrible luck.

Dimitrov has been forced to withdraw from the past four Grand Slams with various injuries, including here last year.

Jess Anderson
BBC Sport at Wimbledon

After all that, Grigor Dimitrov has hurt himself after serving that ace!

He sits on the turf and looks to be in serious discomfort.

Jannik Sinner rushes over.

Oh no!

Grigor Dimitrov slumps to the turf holding his pectoral area after holding serve with an ace.

Image source, PA Media

Grigor Dimitrov might not know it but he's in an even more commanding position than he perhaps realises.

At the worst, this match is going to five sets.

Jannik Sinner has won just one of the past seven five-set matches he has contested, against Daniil Medvedev in the final at the 2024 Australian Open. Quite an amazing stat given he's world number one.

He has also lost both five-set matches he has contested at Wimbledon – in the quarter-finals in both 2022, when he lost to Novak Djokovic despite holding a two-set lead, and last year to Medvedev.