John McEnroe
Three-time Wimbledon singles champions on BBC TV

Federer is not going to be overly pressed or concerned, ultimately. He is going to dictate every point.

Russell Fuller
BBC tennis correspondent at Wimbledon

Willis is unorthodox. Wonderfully eccentric his tennis, against the classic beauty of Federer. It's really a match that has everything. 

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Willis has won a grass-court tournament before - the Great Britain F14 Futures. Oh hello - what a shot, racing in to cut off Federer's drive, slipping, back to his feet, Roger at the net, Willis whipping up a top-spin lob - done the old champ like a Swiss kipper, and the crowd rise as if the championship was won. Roger closes out the game like an apologetic party-pooper, but the mood is alive.

Jonathan Jurejko
BBC Sport at Wimbledon

It goes without saying that Marcus Willis is the rank outsider, with some bookmakers offering odds as short as 1-250 on a Roger Federer win. That's ONE pound for every £250 you lump on the 17-time Grand Slam champ.

Unsurprisingly, former Wimbledon semi-finalist Tim Henman and another ex-British number one Andrew Castle are not rushing to stick a fiver on a seismic SW19 shock.

"I'd be very surprised if he even got a set but hopefully he can serve well and extend a set to 4-4, 5-5 or 6-6," says Henman.

Castle adds: "I think this will be a step too far. But what's the worst can happen? If Iceland can beat England at football then maybe Marcus Willis can beat Roger Federer."

Andrew Castle
BBC Sport tennis commentator

There will be no great panic about the rain for those playing on Centre Court, especially not for guys like Roger Federer.

His great concern might be 'who is this guy I'm playing?'

For Roger, he will take this match as seriously as he does every other contest as Marcus Willis is a man to be respected. Marcus is not going to be overawed by Centre Court, I hope.

Some niche early 90s soap knowledge right here

Willis, with a leftie serve, into the net for a delightful slicing drop volley, but he's staring down his first break point here - slashing approach, in again, popping away the overhead for deuce. Raking forehand into the corner, a winner at Futures level, a simple return for Fed. Another break point - mmm, dreamy serve-volley from the world 772 - but he's in trouble again here. Fed on the backhand overhead, and that's the break taken...

Jonathan Jurejko
BBC Sport at Wimbledon

Roger Federer has only lost once to a bloke ranked outside the top 200. And that was two-time French Open champion Sergi Bruguera on the Spaniard's favoured clay surface in Barcelona 16 years ago.

So how does Marcus Willis - the world number 772 - approach his Centre Court debut against the great man?

"Smile, enjoy it and realise that whatever happens it will be over in a couple of hours. And just go for it," says former British number one Andrew Castle.

"Don't hold back at all. Serve wide and serve with penetration, play hard and don't be afraid to get into Federer's face. He's got to show he feels comfortable on that court."

Mike Henson
BBC Sport at Wimbledon

Image source, BBC Sport

The brollies really bring out the full spectrum of Wimblefans.

A fair few blue-chip company jobs and heavy-duty golf specials, a smattering of official All England souvenirs, a few patriotic Union Jacks and some flimsy market stall cheapies.

And a free newspaper and crossed fingers for the unprepared.

Liking the addition of the hashtag on the picture here. Not so sure about the spinal column on the coffee table, however.

James: Willis is absolutely brilliant, look at the smile on the lad! Love sport, love @Wimbledon, external

Alex Kemmis Betty: Would Willis beating Federer be a greater sporting upset than Iceland beating England? Come on Willis!  

Ellen Thompson: He's grinning like a cheeky chappie. Bless . Whatever way this goes, it's still an incredible week for #MarcusWillis, external

James McCarthy: Come on Marcus Willis. You have already done Britain proud, just enjoy this one.  

Roars from the partisans around Centre as a Federer backhand hits the tape for 30-15. Hold on, that one's gone long, it's 30-30... Nope, too good from the seven-time Wimbledon champ, and now Willis must serve on Centre for the first time in his life.

* denotes next server

Andrew Castle
BBC Sport tennis commentator

Make no mistake, Marcus has won seven matches to get here. Wait until you see him serve.

John McEnroe
Three-time Wimbledon singles champions on BBC TV

I've never seen a guy smile so much when he is hitting volleys!

Willis will be hoping he does not end up pointless.