Some shaking of the head from Nick Kyrgios as he takes a swig of his drink. Never a happy man, is he?

Here comes the Kyrgios chatter, challenging a Tsitsipas point when a shot is judged out at 0-15 down. Hawk Eye proves it was indeed out, and Kyrgios continues to mutters away.

At 30-30, Tsitsipas plays a lovely forehand that Kyrgios can't meet to bring up game point, but for a third successive game, we go to deuce.

From there, Kyrgios plays a brutal backhand for break point, but again he can't convert it. A timely first ace for Tsitsipas then brings up the advantage in his favour but a glorious spinning backhand from Kyrgios brings it level again. Again, he lets a break point go begging, and Tsitsipas can eventually hold.

We're into a second set tie-break which two-time champion Petra Kvitova needs to win to stay in the tournament.

Image source, Getty Images

Probably fair to say the crowd are supporting the Aussie here. Cheers and cries of "c'mon Nick" at the end of every point he wins.

Some sloppy play from Kyrgios allows Tsitsipas to level at deuce though, but he has the perfect reply, slamming down a serve that Tsitsipas can't respond to on his first advantage.

Strap in. If that opening game is anything to go by, we could be in for the long haul here.

Stefanos Tsitsipas looked to be careering to a love-hold on his opening service game but pushes a backhand into the net from close up.

There are cheers from the crowd as Nick Kyrgios pulls another point back, before Tsitsipas finds the net again to take the game to deuce.

He then gifts Kyrgios an early chance to break, but cancels it out with a powerful approach shot.

This time, it's Tsitsipas' turn to get the advantage, and he gets the hold as Kyrgios fails to lift a return high enough.

Image source, Getty Images

Chris Peddy
BBC Sport at Wimbledon

How crucial could this be? Jamie Murray and Bruno Soares win four points in a row to secure the second set 7-4 in the tiebreak and take a two-set lead.

There's relief in the crowd on Court Two, who are showing a lot of love for these accomplished and popular doubles players. There are chants of "Bruunooooo" every time the Brazilian plays a winning shot.

Murray is going to start us off with serve in this third set as they look to wrap this up quickly.

Paula Badosa is one game away from victory, although we're still on serve in the second set in her match against 2011 and 2014 champion Petra Kvitova.

Pat Cash
Former Wimbledon champion on BBC TV

This is the blockbuster of the tournament so far - two of the most talented players. There's been controversy about both of them, more about Nick Kyrgios but this should be a great match.

Kygrios loves the big stage.

Harry Poole
BBC Sport at Wimbledon

Despite many taking the chance to stretch their legs, a great cheer as Stefanos Tsitsipas and Nick Kyrgios step out on to the grass.

What an exciting match this could be.

Kyrgios let his tennis do the talking last time out as he dominated Filip Krajinovic, on the same day he received a $10,000 (£8,200) fine for spitting in the direction of a spectator in his chaotic opener against Paul Jubb.

Which side of the Australian will we see today? Your guess is as good as mine.

Nick Kyrgios won the toss and chose to receive.

Stefanos Tsitsipas gets us under way on Court One.

This will be the fourth meeting between Nick Kyrgios and Stefanos Tsitsipas, and Kyrgios leads their head-to-head 3-1.

Minutes ago I asked you to vote using the thumbs as to whether Kyrgios would extend his record over the Greek, and boy is it close!

Image source, BBC Sport

We're still on serve in the second set on Centre Court, but only just. Paula Badosa had to defend four break points, but manages to do so.

Nick Kyrgios' new tattoo reads 'Give a man a mask and he will become his true self'. But in his case, which persona is the mask?

Is it the 'bad boy'? Is it the generous philanthropist? Or is it even the talented tennis player?

And which one of those will we see in the coming hours?

Read Sonia Oxley's excellent piece on why Kyrgios needed to remind us he is "pretty good" at tennis.

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Wherever Nick Kyrgios goes, controversy often follows.

He was fined $10,000 (£8,200) for his behaviour in his first-round win where he spat at a spectator and called a line judge a "snitch".

Tsitsipas has seen Kyrgios' antics up close. At the grass-court warm-up event in Halle, Kyrgios smashed up his racquet and got into an argument with the umpire over his alleged time-wasting during their match.

"I feel like everyone here knows who Nick is,' Tsitsipas said.

"We have had many great matches against each other. I respect him for his game and the way he fights … when he wants to."

Two-time champion Petra Kvitova is a set down against fourth seed Paula Badosa of Spain and we're on serve in the second set.

This is the second of three matches today on Centre Court with Italy's Lorenzo Sonego, the 27th seed, facing second seed Rafael Nadal later on this afternoon.

Coming up shortly is perhaps the most eagerly anticipated match of the day. That's right - it's time for Nick Kyrgios v Stefanos Tsitsipas.

Australian Kyrgios beat Greece's world number five Tsitsipas in Halle in June.

Will he win again? Thumbs up for yes, thumbs down for no.

Image source, Getty Images

Alize Cornet speaking on court after beating world number one Iga Swiatek in straight sets:

"I have no words right now - it reminds me of the time I beat Serena [Williams] on the same court eight years ago exactly. This court is a lucky charm for me. I am a huge fan of Iga [Swiatek], she's so talented and an amazing player and nice ambassador of women's tennis so I'm very flattered I beat her today.

"This kind of match is what I live for, what I'm practicing for, it drives me and I knew I could do it. I had this belief even with her wins, I thought there is a moment you can beat her it's now on grass so I was just believing very hard and I have the best team by my side and the best crowd. I guess I like the upsets, it's a really nice feeling right now and I need to process because I still feel like I'm playing I'm not completely realising what I've done.

"I'm like good wine, in France good wine always ages well, that's what's happened to me. It's unreal - I'm playing one of the best seasons of my career I feel great on the court, I'm having so much fun I feel good physically, eight years after my first qualification into the second week I can say I'm still there I'm still so motivated and I still have the fire in me and I hope you guys enjoyed the match."

Chris Peddy
BBC Sport at Wimbledon

Rajeev Ram holds serve to close out the match in straight sets.

The crowd are on their feet applauding Ram and Joe Salisbury, the top seeds certainly had the supporters on their side for this one, who have celebrated every point of Ram's match-winning service game as if it was match point.

Briton Salisbury and American Ram will face Rafael Matos of Brazil and David Vega Hernandez of Spain in the next round.

Harry Poole
BBC Sport at Wimbledon

Wow! Who saw that coming?

Iga Swiatek has probably forgotten what defeat feels like. That’s going to hurt.

Delight all around Court One for Alize Cornet, though. What an effort.

“It reminds me of the time I beat Serena Williams on the same court eight years ago,” says Cornet.

A huge performance.

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