Dimitrov played some 10/10 tennis in that last game. Outrageous behaviour. Can he back it up and not do anything stupid in his service game though?

He's 15-30 after spanking one into the net. 15-40! He giveth, he taketh away...

Dimitrov goes long and that's a break again for Federer...

A furious shake of the racquet from Nadal as Muller whacks a return high and long.

A deflection from the net cord goes against Nadal, but he holds his serve as this match ticks past the three hour mark. I'm fast running out of biscuit fuel...

Dimitrov is finding his best form now, too little, too late. A great chase and run down the line but Federer is only pressed to out style him with a classic serve and volley.

15-30 on the Fed serve. That's about as good as it has got for Dimitrov today. Can he convert? Oh yes what a shot down the line! At full stretch, a Federer volley at ankle height and he manages to pass.

Break point for Dimitrov. Deuce. Outrageous shot again! Another break point. He's turned into Bjorn Borg all of a sudden and breaks!

The crowd on their feet...

Jamie Baker
Former GB Davis Cup player on BBC Two

I think the break at the end of the last set helped Muller, he took the opportunity to regroup and the fact he is serving first in the fifth set could make a difference. If he can hold one or two more times then that scoreboard pressure could help him.

The swing on Muller's serves! Outrageous movement.

It's helping him towards a love hold before Nadal manages to hoick back a serve from out wide, and Muller's volley ends up at the bottom of the net.

He holds. New balls, please...

Image source, EPA

Dimitrov looks a beaten man but he can still find the odd cracker, lacing a backhand winner down the line. Wooof!

And that's another belter of a shot! He holds.

I agree with Mr McEnroe, actually. But then, I don't have Court One tickets... you just feel that this Nadal game is going the distance.

Beautifully deft strike from Nadal up at the net and he races to a 40-0 lead as Muller whirls a return long. And then the return to end all returns, spinning perfectly onto the line, ensures the Spaniard holds.

Rafael Nadal manages a magical shot during his match against Gilles Muller.

Nadal swiftly follows it up with an incredible backhand.

John McEnroe is not the easiest man to please but Roger Federer "makes it look easy." Watch a couple of classic Federer moments of brilliance below.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

With the way Nadal is going, and the probability of rain tomorrow - I'd move Djokovic to Centre Court.

We've still only been playing for 80 minutes. Roger Federer misses an easy shot! My word. Long with the whole court to aim at.

But he stil holds.

Quarter-finals are on Tuesday with Johanna Konta's match against Simona Halep second on Centre Court following Venus Williams v Jelena Ostapenko.

A roar from Gilles Muller as he draws the error out of Nadal - but only a polite round of applause and a few whoops from the crowd, who you suspect are on #TeamRafa.

This has been an almighty performance from Muller, though. He keeps going out wide with the serve, keeping Nadal on his toes, and that allows him to hold.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

You can be top 10, still a great player but he's not the elite. I've seen too many signs that Dimitrov is just not getting it.

It's getting away from him.

Shall we play best of seven?

Another peach of a backhand winner from Roger Federer, his 18th winner of the match. Dimitrov then plays a loose shot to hand Roger a break point.

We all know what's coming next. Well, OK, an ace from Dimitrov. But then Dimitrov hits the net again and then fires long and wide. Wasteful - Federer has the break.

Image source, Getty Images

Lots of talk about the scheduling today and whether it's been disrespectful to the female players, but Slovakia's Magdalena Rybarikova doesn't seem to mind.

"To be honest, I enjoy watching more men's tennis," she said after winning her fourth-round match on Court 18.

"I think also for the spectators it's more enjoyable to watch - because it's huge names like Federer and Murray and I think they deserve to be on Centre Court.

"Sometimes girls win 6-1 6-2 and I don't know if it is for spectators, but sometimes it's boring."

Nadal's serving has got much better as this match has progressed but Muller's found that low return again, which caused Nadal to fluff his lines in the first two sets.

That's gorgeous from Nadal! A backhand winner, two hands swinging hard, and that gets his box on their feet!

BBC World Service

“Game, set and a birthday song” – The BBC World Service’s Nuala McGovern has been out sampling the atmosphere of the Wimbledon crowd; where it’s not just a special day for the players.

Twins, birthdays, a sing-along. What's not to like?