The Swiss former world number one eased into his 14th Wimbledon quarter-final with victory over American Steve Johnson to equal Martina Navratilova's record of 306 Grand Slam singles victories.  

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Talking of Roger Federer, the swish Swiss is first on Centre Court today.

Standing at the opposite end will be Marin Cilic - the brooding lighthouse Croat who defeated him in straight sets in the US Open semi-finals the last time that they met.

The loss was one of several that triggered reports of the great man's demise.

But - at the age of 34 - he has stayed one step ahead of Father Time and young pretenders and seems the man most likely to provide the weekend opposition if Murray makes the final.

Frank Keogh
BBC Sport

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One of the lovely pleasures of walking around the Wimbledon grounds is spotting some well-known players in doubles action on the outside courts.

There was a decent crowd in for this pair on Tuesday. But can you name them? Send in your answers via #bbctennis, external on Twitter and we will reveal all after midday.

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Let's not get ahead of ourselves however.

Jo-Wilfried Tsonga has a history of tearing up trees and expectations on Centre Court.

Five years ago, as the world number 19 he was two sets down in his quarter-final against then six-time champion Roger Federer.

But a formality turned into a mutiny as Tsonga roared back to win in five and smack the gobs of Centre Court.

He has nothing to lose today. And that is when he is at his most dangerous.

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Andy Murray also has 11 wins from their last 12 meetings with the French 12th seed. 

If the Scot can make it 12 from 13 on Centre Court today he will nudge up against some of the game's greats in the record books.

It would dram him level with Bjorn Borg on 51 Wimbledon victories.

It would see him jump ahead of John McEnroe and Stefan Edberg by racking up a 20th Grand Slam semi-final appearance.

Most importantly it would move Murray to within two matches of getting his hands on that little gold fella on Sunday afternoon.

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"I'm not sure that he serves better than me. I'm not sure that he hits his forehand harder than me either."

"Andy is not any quicker than me, but he moves better. He's got a wonderful defensive flair. But what's he got that I don't have?"

Two Grand Slam titles, an Olympic gold medal, 25 more Tour tournament wins, about £22m in prizemoney, the freedom of Stirling, two border terriers and a bouncing baby daughter.

Think that is about the sum of it Jo-Wilfried.