Mark Woodforde
Seven-time Wimbledon doubles champion on BBC Radio 5 live

It is nothing short of what we expect from Nadal. He's forcing Muller to play at a high level.

I'm going to end up dreaming about this match tonight, aren't I?

Advantage Nadal as a Muller drop shot, from on the baseline, lands in the net - and Nadal holds with a glorious, beautiful, almost impossible forehand flick that lands just on the line!

Court One stands and roars!

Muller shanks a Nadal serve high and wide!

A tumble from Nadal as he goes out wide, stretching to return a Muller slice.

He gets racquet on it but he can't get up quick enough. Fourth match point Muller!

A little tickle off the net cord looks to have foxed Nadal but no - a skip forward, a whack of a forehand, and he has the advantage.

And Muller wrests it back to deuce by somehow, in a move that just defies all sensibilities, getting his racquet to a drop shop and working a winner beyond an advancing Nadal.

Back to 40-40 we go...

Nadal saves it with a forehand smash at the net!

Deuce!

Nadal goes for the overhead winner after a tussle at the net, he leaps to meet it - and smacks it out of bounds!

The Spaniard huffs as an almighty serve gets called out - he's got no challenges left anyway and er, it's out - and he gets on the board in this game with a furious backhand winner.

That's an almighty forehand from Nadal and brave, too, hitting it right where Muller was moving to but there was enough zip on it to beat him.

What a backhand though! Match point Muller! 54 minutes after the last one came up!

Watch the most delicate of drop shots from Nadal earlier on his way to holding his serve.

A couple of hours ago, I texted a friend saying I'd be okay for dinner because "this Nadal match should be over in a jiffy."

I am an idiot. Here's Nadal to serve game number 20.

Elliot J. Cornish: Plot twist: Djokovic v Mannarino finishes tonight but Nadal v Muller doesn't.

Tony Bickley: What a match this is!! Really want Muller but think Nadal is going to snatch it 11-9.

Dan Reynolds: It's matches like this that make me glad I invested in a good, comfortable couch. Glued to it right now.

Now it's Muller with the advantage, cracking a forehand beyond Nadal, and he waits for the shouts of support for Rafa to subside before he cracks another ace down the T.

Scenes.

Image source, Reuters

An overrule from the umpire! A Muller serve is called out but it's in, and Muller doesn't miss a beat, hammering down his 28th ace to take us back to deuce.

He's saved four break points so far. Not giving an inch.

Long from Nadal! Too much oomph on that forehand and Hawk-Eye agrees! We're back to our fourth deuce.

Not to worry, though, here's the fourth break point! Brilliant movement from Nadal to meet a shot from Muller and hammer a winner beyond him.

How has that landed in?! Muller thinks a Nadal forehand is going flying out but it bounces just, only just, on the line!

Break point again Nadal, and again Muller saves it with a short volley that Nadal tonks long.

Oh no! Just as we arrive at the four hour mark, Muller slaps a simple return into the net, handing Nadal his third break point!

Image source, Reuters

Muller comes forward to meet a Nadal slice but he overworks his return - break point Nadal! It's only his second of the set!

Can he convert it?

No! That's a glorious save from Muller, a backhand straight past Nadal! That's an exquisitive passing shot from the big man.

Shot! Ooh, that's a proper tonk of a forehand from Nadal to send Muller sprawling.

Muller's not having it, though. Big serve after big serve, pushed into the corner of the court, Nadal unable to control his returns - but an attempted drop shot to a monster backhand from Nadal goes wonky for 40-30.

Deuce! Another Muller drop shot into the net! Nadal covered up so much ground to get to the net and slide over the return that surprised Muller.

82 minutes, we've been going in this set. It's never going to end.

Here we go, Muller serving game 19.