Pat Cash
Former Wimbledon champion on BBC Radio 5 live

"Nick Kyrgios is having a bad patch, where his concentration is going a little and he's playing poor shots. He does this quite often."

Kyrgios starting to flake, starting to wobble - horrible backhand into the net, second serve following second serve, two more break points. Chance for Murray here, gap down the line - nope, he's muffed it. Another first serve misses, Murray slicing it on the backhand, Kyrgios being driven insane by the cruel repetition, frazzled backhand into the net, break taken...

Watch Andy Murray win a point in the first set by hitting the ball straight into Nick Kyrgios at the net.

Murray into the net for 15-30, and Kyrgios sniffs the tiniest opportunity - not this time, my Antipodean friend, Murray brushing a forehand cross-court before easing away the stop-volley winner. Oo la la, what a forehand from corner to corner that is, and Kyrgios offers up a strangely half-hearted forehand slice that dies in the net's stringy embrace.

The Aussie stops the rot with a rapid-fire hold. Still a tad greasy out there, a ball-boy's feet going from under him like Bambi on the frozen lake as he attempts to corner the net-post with a sprinter's lean.

The winner of the duel between Nick Kyrgios and Andy Murray on Centre Court will face one of two suave Frenchman in the last eight.

Jo Wilifried Tsonga and Richard Gasquet are keeping a Court One corner of Wimbledon forever France this afternoon.

All on serve so far. Watch over here.

Bernard Tomic is into the deep end of a fifth set against Lucas Pouille.

Watch this forehand winner on the run from earlier on in the set.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

Kyrgios just blinked at the wrong moment. 

That is why it is important to focus early on in games.

Don't let yourself get 0-40. He got a little careless and tight and missed a gimme volley to lose the set.

Image source, BBC Sport

All the momentum suddenly with Murray, thrashing a forehand pass down the line, Kyrgios stranded, slipping, down. Hold to love, crowd roaring, wind in his sails.

If you're just checking us out after a long Monday, let us bring you right up to date with the Wimbledon headlines:

• Roger Federer won in straight sets against Steve Johnson
• Kei Nishikori retired with injury against Marin Cilic
• While Serena Williams was - as you might expect - in dominant form

But our favourite story of the day concerns Dominika Cibulkova, who is into the last eight of a tournament where the final clashes with her wedding day.

Wimbledon or wedding? Wedding or Wimbledon?

Image source, PA

Milos Raonic has survived an almighty scare, coming back from two sets down to pack off Belgium's David Goffin.

He will face the Djoko-slayer Sam Querrey in the last eight.

I say - cross-court backhand pass from Murray beyond the baseline, and he follows it up with a cunning backhand slice that dies on Kyrgios's shoelaces - 0-40. Ace out wide, another hammer down the middle. Two set points saved, one to come. Murray on the run, flashing forehand, Kyrgios charging in for the volley... nets it!

Ahmed Nurein: Oh boy, Kyrgios has got a massive serve. This is harder than Murray could have imagined.

That's lovely from Kyrgios, working the net opportunity and slapping away the volley like a man in an Outback bar getting rid of a fly incoming on his schooner. Murray gives him no chance this time however, creaming a backhand straight into Kyrgios's midriff as he comes back for second helpings.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

Kyrgios is composing himself well, playing well and putting pressure on Murray, it is close early on.

The pressure is on Murray as the favourite so it is interesting to see how he handles it here.

The first set looks destined for a tie-break.

Andy Murray produced this peach of a lob earlier on in the set.

Image source, Getty Images

Elena Vesnina is through a quarter-final meeting with Dominika Cibulkova.

She'll sleep well tonight after a massive third set.

Vesnina has been in two Wimbledon finals, twice coming up short in the doubles.

And he manages it at a canter, shipping just the solitary point through an over-zealous forehand drive, leaning on the sweet rhythm of that pummeling serve. Feels like a tie-breaker coming round the bend.

Venus Williams joins her sister Serena in the quarter-finals after beating Suarez Navarro in straight sets.