Disquiet in the stands.

Marin Cilic, bruising the ball from the back, takes the first three points and a double mini-break. Mini double-break? Potato, potartoe...

A bazooka serve and suddenly he is looking at the rough end of 4-0.

A return long make that 5-0.

A lot of work to do from here.

Peter Fleming
Seven-time Grand Slam doubles champion

Raonic played a flawless set, certainly on serve. He won 82% of points behind his first serve and 92% behind his second serve. That's exemplary. 

Jonathan Jurejko
BBC Sport at Wimbledon

Stat attack! Before that crucial Raonic break, the pair had only dropped five points on serve in the previous seven games. Then the Canadian sixth seed decided enough was enough. Clinical. 

Milos Raonic had to come back from two sets down against David Goffin in the last 16.

He's not up for playing that game again. 

The big Canadian has nabbed the first set 6-4 against Sam Querrey on Court One.

You can watch that match on this link.

Chris Sansome: Strawberries? Check! Gin? Check! Come on Roger!  

Tahirah-Rebekkah: I'm actually too scared to watch Roger Federer so I'm watching Milos and Sam instead  

Mary Pierce
Former French Open champion on BBC Radio 5 live

Roger can invent shots and make them up as he's playing. He's incredible.

Roger Federer, serving to take this first set to a breaker.

Oh that is delicious. Centre Court's matinee idol hits the high note with a backhand touch across court that dies and drops just in.

Marin Cilic's Hawkeye review only confirms its accuracy.

We are into a shoot-out

Jim Courier
Former world number one on BBC TV

Image source, BBC Sport

You would think Cilic would be going at Federer's backhand but he is so good at blocking with the chip backhand, you can get more free points going to his forehand with the first serve.

Jeff Tarango
Former professional tennis player on BBC Radio 5 live

"For 5-5 all, 31 minutes, this game is moving along pretty quickly."

Faiza Zedkeil Zareen: Friends out celebrating Eid ... and me? At home cos Wimbledon. Make my Eid better, Federer   

Alex: Days off of dreams, feet up and both games on!   

Nikki Kerr: It's my birthday today and Federer, Murray & Tsonga are all playing at Wimbledon. Why am I not there and at work instead?

Peter Fleming
Seven-time Grand Slam doubles champion

It's such an irresistible combination from Raonic - a big serve to get his opponent out of position and he is able to just drop the volley over the net. It's so nice to see the Canadian embrace this style of play.

Jonathan Jurejko
BBC Sport at Wimbledon

There are going to be a few bruised tennis balls that will need some treatment after this match. Querrey thumps a Raonic lob back into the ground, the ball bouncing up high into their crowd to the delight of the fans. If Court One was a golf green Querrey would be pulling a pitch-mark repairer out of his back pocket. 

Marin Cilic has been making some small, yet effective, improvements to his serve.

Cilic, now under the guidance of coach Goran Ivanisevic, has tightened up his serve since 2012 - as this video shows. 

Tim Henman
Former British number one on BBC TV

There have still been a few question marks about Roger Federer's back but there's no problem looking at that leap.

The boy can jump...

This handsome chap was up for a selfie on Centre Court.

And David Beckham didn't seem to mind, either.

A lovely forehand cross-court winner brings the score up to 40-30. Federer's on the chase.

The R-Fed fans are enjoying this. They clap, they ooh, they ahhh in unison.

But Marin Cilic finds some empty grass to place his own forehand winner. The Croat holds again. 

And then Federer sees out his own service game with an ace. Lovely job. 

We're stil level.

Image source, Getty Images

Jonathan Jurejko
BBC Sport at Wimbledon

Four games. Four holds. Anyone expect anything less? Not one well-spoken man sat behind the media seats. He's expecting a marathon match.

"We're going for 57-55 in the fifth," he chortles. 

Hope he's brought plenty of food supplies. 

Jim Courier
Former world number one on BBC TV

Cilic has big swings on his ground strokes so if you give him something to hit he can absolutely pummel it. 

He is a pretty good mover into the open court but I think he is vulnerable to the ball behind him, I don't think he stops and changes direction too well.

Image source, PA

Edward Ditchfield: Damn you, Wimbledon! I'm supposed to be writing my PhD thesis... My supervisor is going to kill me.. Oh well... Come on Federer!  

Al Quinney: Looks like it's going to be one of those tie-breaker matches   

Andrew Neill: I just really really want another Murray v Federer final. Please sporting gods, do me this one favour...