Pat Cash
Former Wimbledon champion on BBC Radio 5 live

This is where Federer is often at his best. He's so good at tie-breaks.

Federer gets the tie-break going, and hammers down a fine serve that Zverev lashes wide.

First point, Fed.

Tim Henman
Former British number one on BBC TV

Zverev had surprised me with his baseline exchanges. He's stayed there, got forward when he's had the opportunity, moved well. Federer is really in a match right now.

Zverev looks like he's going to come through a near-perfect service game but he double faults and then volleys over the baseline.

And then he nets. Deuce.

But Federer can't clear the net with a backhand and Zverev sends us to a tie-break with an ace.

Jonathan Jurejko
BBC Sport at Wimbledon

Image source, BBC Sport

We've got a nice little story brewing here. The British Boys have got things rocking after winning the third set breaker to nip ahead of fourth seeds Pierre-Hugues Herbert and Nicolas Mahut.

The French pair are getting rattled. The home crowd are getting excited. Probably helped by some gentle alcoholic of lubrication. The fans that is, not Herbert and Mahut.

Tim Henman
Former British number one on BBC TV

Live by the sword, die by the sword. You know when Federer is up against it, he will look to be aggressive and not be scared to finish the point up against the net.

After the second deuce, Federer has game point and he holds as Zverev hits just wide.

A sigh of relief from the 35-year-old.

Mischa Zverev comes out on top in a heavy rally and then Federer hits long over the baseline. The German is 0-30 to the good.

The third seed recoups to 30-30 with a volley at the net.

The crowd thoroughly enjoy the next point, as the pair come close to the net and exchange blows. Federer prevails.

But he forces deuce after a fourth unforced error, and soon Zverev has break point thanks to an overpowering return.

Roger recovers with a mahoosive ace. Back to deuce

The brother and sister combo of Naomi and Liam Broady are in action over on court 18, in their mixed doubles match against Czech pair Roman Jebavy and Lucie Hradecka.

The Brits lost the first set but it's all square in the second.

Elsewhere, defending champions Heather Watson and Henri Kontinen are just about to get going against Aisam-Ul-Haq Qureshi and Anna-Lena Groenefeld.

And Jamie Murray and Martina Hingis are cruising in their match on court two with Neal Skupski and Anna Smith.

You can choose from any of those matches over here.

Zverev throws down an 124 mph ace for 30-0.

Federer fails to get a backhand return over so we go to 40-0.

And the German watches his opponent hit long for another hold to love.

A massive Federer volley lands on the baseline. The line judge calls out, the umpire overrules. The Swiss throws some squinty-eyed evils to the officials about the initial decision.

Another hold to love for the seven-time champion. Simple.

The poor line judge is getting a right old battering this evening - she's just been hit for a second time by a Zverev ace. Stinger.

The German holds comfortably to restore parity.

Image source, AFP

Jonathan Jurejko
BBC Sport at Wimbledon

Cross-Channel pride is at stake here. On court and in the stands. You can hear 'Allez!' as much as you can hear "Come on!"

But it is all being played with grins on faces. Team GB have to scrap for their lives in a marathon 10th game in the third.

They see off SIX break points for the Frenchman before finally holding, both Clarke and Willis beaming wider than Wallace of Wallace and Gromit fame.

That sparks some enthusiastic chants from the British fans. It's like a Davis Cup atmosphere now.

Mark Petchey
BBC Sport tennis commentator

Zverev is trying to think his way through these service games. He will be happy to have the opportunity to play on Centre Court, there was a time in his career when he was thinking of quitting. He's also had a lot of injuries.

This pair have the Centre Court crowd purring with delight after a 12-shot rally, in which Zverev comes out on top.

The German has an unlikely break point and he takes it with open arms as Federer sprays a forehand high and wide.

This is becoming a tasty little battle now.

Zverev finds some bite with his service game - thanks to a bit of old serve-and-volley.

The German is out-witted at the net but he holds when Federer bounces wide.

Image source, AFP

Jonathan Jurejko
BBC Sport at Wimbledon

For those not replenishing with an ice-cold bevarage, or having a kip on the grass behind Murray Mound, there is still plenty of decent tennis on the outer courts.

Home pair Marcus 'Willbomb' Willis (you remember him) and Jay Clarke are having a real Anglo-French rumble with Pierre-Hugues Herbert and Nicolas Mahut in the men's doubles.

Herbert and Mahut are two-time Slam champions and the fourth seeds here, but the Brits - playing together for the first time - are more than holding their own at a set each and on serve in the third.

Image source, Getty Images

One, two, three Brits in action on Court Two but it's Swiss Martina Hingis who adds a touch of star quality as she and Jamie Murray take the first set in their mixed doubles match against Neal Skupski and Anna Smith.

Hingis has won five mixed doubles titles in Grand Slams, to go with 12 doubles and five singles titles. A machine.

You can watch this match here.

Roger Federer sails through his service game to love at the same breakneck speed as we've raced through the aforementioned chocolate snacks.

With the awkwardly-placed sun in his eyes, Zverev is outfoxed by a Federer forehand.

Roger goes for the same spot again on the next point but finds the net instead.

The Swiss mixes it up with a backhand winner for 15-30 and then bring up two break points.

What can the third seed do here? Get the early break, that's what.