Image source, Reuters

Here is a stat for you. No player has won the men's Wimbledon final from match point down in the Open Era.

Roger Federer, his wife Mirka and coach Stefan Edberg have their his eyes trained on another slice of history as the Swiss holds to love. That serve as matured into a bit of a monster.

Alex Scutcher:, external Whether or not he wins today, Federer is the greatest tennis player of all time for me.

PD Smith:, external This is the first time I've seen Djokovic look really tired. Federer is cucumberesqe, as always.

There were chances in that game for Roger Federer, but they slide by untaken and the Swiss expended plenty of energy for no reward.

He nets a makeable forehand at 30-15 and then clocks up miles chasing a lost cause in the next rally.

Jimmy Connors
Two-time Wimbledon singles champion on BBC TV

Image source, Getty Images

"To me it looks as if Federer, at 32, is the fresher of the two out there. He has a bounce in his step and he will know he should have lost this match. But you would hate an injury to have an impact on this result."

Roger Federer is edging into the ascendancy. The Swiss holds to love, dusting off his palms with a whippet-quick game.

Djokovic was on top all through the opener though and came a cropper at the end of it.

Spanish golfer Sergio Garcia: , externalWatching the Wimbledon finals and can't sit still!! What a match! Best final I've seen in the last five years. They both deserve to win!

French tennis player Alize Cornet:, external Come on Roger Federer!!! I believe in you!!! So excited about this fifth set! #Wimbledon2014 #amazingfinal.

The physio has his fingertips digging into the right calf of Novak Djokovic, trying to work out the gremlins. Has that done the trick? The Serb bounces back out to face serve, testing out the muscle on the way to the baseline.

Novak Djokovic is trudging around the court, flexing his leg while a hint of a grimace plays around his features.

He holds to 15, but umpire James Keothavong is on the phone at the end of the phone, hitting the speed dial for the trainer.

British number one Heather Watson:, external What a final! The level is so high. Loving that it has gone to a fifth #exciting #cheekyloobreak

Australian international footballer Tim Cahill:, external This match is crazy. Both are mentally and physically on a different planet. Not sure who will win but I know I'm enjoying this Wimbledon.

Three-time Wimbledon finalist Andy Roddick:, external This is just awesome to watch .... Two legends.

Roger Federer bashes down an ace to crown a hold to love. The shadows are lengthening, the sun is cooling, conditions are getting a little easier for both men. Three hours 23 minutes on the clock.

Roger Federer may not get to tread the Centre Court boards again in a final and he is not going to leave anything in the tank.

He swats away a winner off return as he gets a clear read on the Djokovic serve for 30-15. He gamely presses the net on the final point, but can't keep the lid of his volley, the ball floating out.

Image source, PA

To a standing ovation from the Centre Crowd, both players head off behind the scenes to scrape together scrambled senses and try and get their heads around a decider.

Where is that all-important momentum hiding in this melee? Your guess is as good as anyone's.

This match has the fifth set it deserves.

"Roger, Roger, Roger," chant the crowd as their adopted king steps up to serve for the fourth.

He doesn't let down his subjects.

Martina Navratilova
Nine-time Wimbledon singles champion on BBC Radio 5 live

"The momentum is with Federer. He's the fresher of the two. Novak got tired halfway through this fourth set. If it goes to five, Roger will have the edge."

Andrew Castle
Former British number one on BBC TV

"There's no script here on Centre Court and we have no idea how long this performance is going to last either. "

Jimmy Connors
Two-time Wimbledon singles champion on BBC TV

"Federer put the pressure on Novak when it counted. Djokovic had his chance and sometimes you only have one chance. That is playing on Novak's mind and now all Roger has to do is hold his serve and he has the set."

Former Manchester United and England defender Rio Ferdinand:, external Federeeeeeeeeeeeeeeer !! I love this guy! THE tennis player among tennis players past & present.

Actor Bradley Cooper wipes his palms across his face in disbelief in the Royal Box. I know what you mean Brad.

Djokovic's wheels are wobbling badly. Errors pock-marking his game and Roger Federer suddenly has 0-40 and three break points. A second-serve ace wipes off the first. Another service winner zaps the second.

But the third is the charm. Federer and Djokovic trading stinging groundstrokes and it is the Serb who puts a little too much muscle behind one.

Andrew Castle
Former British number one on BBC TV

"Djokovic has to calm himself down, step up to the line and hold serve because he must be rocked after being aced on Championship point."

Image source, PA

Novak Djokovic has lost five out of his last six Grand Slam finals. I wonder if that stat is rattling around upstairs?

He has Roger Federer backed up to the cliff edge again as the Swiss's double fault gives him 30-30 and then an error offers up 30-40 and a first championship point.

A Federer serve down the middle. "Out!" is the call. "In!" is the truth reveals Hawk-Eye.

Lummy, this is tight. Federer's serve keeps Djokovic just about at bay from deuce to keep the contest alive.