Kei Nishikori is a Grand Slam finalist don't forget so do not expect this to be easy.

Murray steadies a little by getting to 30-0 and then someone in the crowd gets a Scottish glare as they disturb the world number one as he is about to serve.

The Briton doesn't let it bother him though and clinches the game. Better.

After that poor service game, Murray shanks a return on the first point of the next one. Not ideal.

He is then caught out by the power of Nishikori and then puts another return in the net.

In the first two games Murray looked fully up and running but he has gone well off the boil now.

Another double fault!

Nishikori has the early break.

I'm not sure the sun can be blamed there. It looked to have nipped behind the clouds for the second double fault from the Murray racquet.

That was not what Andy Murray was after. A gift of a break.

Image source, Getty Images

Both players are wearing a baseball cap under the Paris sunshine.

But, is the sun still affecting the Murray serve? He aborts his first ball toss and then double faults. Sun in his eyes maybe? Anyway, it brings up two break points for Nishikori...

We pause at the start of the second game as Murray is unhappy with a light on a TV camera at the top of the stand.

Murray finds a couple of great angles to win a lengthy point with a winner, giving him 15-30 and a look at Nishikori's first game.

Nishikori recovers though and takes the game as Murray puts a drop shot in the net. Is the Briton trying to test our the eighth seed's legs early on?

Andy Murray will be well aware of the shock of Novak Djokovic going out earlier today as he kicks us off.

The Briton looks sharp early on riffling down a few first serves.

Nishikori starts well too, showing great touch to win a point at the net. In the end Nishikori nets to allow Murray to get on the board straight away.

Image source, AFP

Murray will us get under way, dressed in white and navy shorts.

Nishikori is wearing green with orange and white trim. His outfit very nicely matches the Roland Garros colour scheme. Anyone else appreciate these things or is it just me?

World number one Andy Murray against world number nine Kei Nishikori for a place in the French Open semi-final.

"Play."

Here's how the pair match up. As Piers says on his day Nishikori can be brilliant.

Let's hope for the sake of a good spectacle that he is fully fit today.

Image source, Getty Images

Piers Newbery
BBC Sport at Roland Garros

Wrist, hip, rib, back, groin, knee, abdomen..... it might be easier to list the body parts that Nishikori has not injured in recent years than those which have let him down. One of the great talents of the game, Roger Federer once trained with the teenaged Nishikori and came off court saying he already had a world-class backhand. At 100%, or more realistically anywhere over 75%, the Japanese player is a match for or anyone. Unfortunately, several visits from the trainer already this tournament suggest he remains fragile.

Image source, Getty Images

Having struggled with fitness and form for much of 2017, Murray has played some of his best tennis of the year in his last two rounds in Paris.

Straight-set wins over Juan Martin del Potro and Karen Khachanov have suggested Murray could repeat last year's run to the final.

"I'm happy with where my game's at," the Scot said after his fourth-round win.

"Everything is going pretty well just now. I'm feeling good going into the middle part of the second week."

Both players are now out on Chatrier.

The cameraman gets right up in Andy Murray's face. He already has a sweaty brow. It looks as though the world number one has already had a testing warm-up before coming on court.

Piers Newbery
BBC Sport at Roland Garros

Today's ticket holders have had a pretty bumper day to enjoy, in contrast to yesterday's unfortunate souls who watched a lot more rain than tennis. They were, however, reimbursed in full, which got the biggest cheer of the day when it was announced. It's still pretty chilly but a cool, breezy afternoon should hold no fears for Britain's number one, and the rain appears to have left for the week.

Image source, BBC Sport

Image source, Getty Images

Today Murray's opponent is Japan's Kei Nishikori, the eighth seed.

The pair are no strangers to each other, they have met 10 times.

Murray has won eight of those but it was Nishikori who came out on top at this stage of the 2016 US Open.

Not that he remembers it...

"I don't even know if I won or lost. I won?" Nishikori said when asked about the on Monday.

Those of you with a good memory will also remeber a marathon Davis Cup tie between these two last year, with Murray eventually winning in five.

More of the same today?

Image source, Getty Images

Hello again. Women's number two seed Karolina Pliskova has booked her place in the semi-final so now it is Murray time.

We all know how this goes by now, this is the Scot's 28th Grand Slam quarter-final after all.

It will be tense and at times hard to watch - there'll probably be a time when Murray looks to hate the thought of even picking up a racquet.

But this one is all set up to be a Muzza thriller. Get yourself comfy and grab a baguette with some French cheese.

Andy Murray is looking to make his fourth consecutive French Open semi-final.

Image source, Getty Images

Andy Murray started this year's French Open with few people fancying his chances of a first Roland Garros title.

Slowly and surely he has worked his way into this tournament and now we're at the quarter-finals.

Forget the doubts from the build-up, Muzza is right in the mix.

The last four is within touching distance, can he make it?

Over the next few hours we'll find out.

Right, we're going to take a quick breather after those two dramatic quarter-finals. A quick dash up to the BBC canteen, maybe a cup of tea, and then we'll be back for the Andy Murray match.

About 15:00 BST? See you then.

But don't worry, we're not neglecting the final two women's quarter-finals.

You can follow French hope Caroline Garcia's tie against second seed Karolina Pliskova, plus tournament favourite Simona Halep versus fifth seed Elina Svitolina, in our dedicated Sportsday coverage.

Head over there now! Au revoir...

More from Djokovic: "It was not there for me today, especially in the second part of the match. I was unable to hit the ball well and making unforced errors. He was getting better and better.

"The last couple of tournaments I have had some great tournaments and it was unfortunate to finish Roland Garros in this way.

"I always expect to do well but it is a fact that I'm not playing close to my best. I'm trying to work on things, sometimes it works, sometimes it doesn't.

"This is a whole new situation for me, not winning a big tournament for eight or nine months - this hasn't happened for a while.

"All the top players have gone through that and I guess I have to learn lessons and figure how to get through. it is a big challenge and I'm up for it."

Image source, Reuters

Novak Djokovic on his semi-final defeat by Dominic Thiem: "The third set, obviously, nothing was going my way and everything his way. It was a pretty bad set.

"I think it was decided in the first set, I tried but I lost a crucial break at the start of second set.

"He deserved to win, he was definitely the better player on the court.

"He made it difficult, he has really heavy spin and can play quick. He has an all-round game and on clay is a tough player to play against.

"It was easy to lose rhythm and there was no way back from there."

Image source, Reuters

W W W W 3R F 2R QF.

Novak Djokovic's last eight Grand Slam results, starting with Wimbledon 2015.

From the top of the world to...

Well, Hunter... we're glad you asked that! Because we're going to tell you.

That was Djokovic's ninth Tour-level bagel - and his third at a Grand Slam. The last one came in Rome last year against Thomasz Bellucci.

The last one in a Slam? The 2005 US Open against Gael Monfils...