Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
World no 1 Murray rallies after losing first set
Third seed Wawrinka wins 6-3 6-3 6-1 against Cilic
Defending champion Djokovic out as Nadal reaches last four
Halep recovers to beat Svitolina, setting up Pliskova semi-final
That's all from us.
A marathon day that did not disappoint.
The defending champion is out. Simona Halep produced a miracle comeback while Andy Murray keeps marching on.
We'll be back tomorrow with coverage of the women's semi-finals.
Au revoir.
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
Who are you backing?
The world number one? The nine-time champion? The 2015 champion? Or the young pretender?
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
So that is the men's semi-final line-up complete for this year's French Open.
Andy Murray will play Stan Wawrinka while Dominic Thiem's reward for beating Novak Djokovic is a last four match against the imperious Rafael Nadal.
Those matches will be played on Friday.
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
Image source, ReutersIn a funny way, Andy Murray may have umpire Carlos Ramos to thank for that turn-around.
The Scot was riled when Ramos called a time violation after Murray had just pulled out of a serve.
At that point Murray trailed by a set and was locked in a nervy service game at the start of the second.
Murray powered through that game with a big cry of "let's go" and a fist pump in the umpire's direction and from there, minus the odd blip, took control.
#bbctennis
Dennis Ethan: Murray - Wawrinka is the SF I was looking forward to...Thanks! Friday has to come here sooner enough. Allez Stanimal!!
Simon: Andy Murray has done brilliantly to reach the semi finals, have to say he's the underdog at this point though.
Chanice Hird: A big test but Andy came through with flying colours! Didn't think he would get to this stage! Well done!
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
Andy Murray after his win over Kei Nishikori: "It was windy and the timing was difficult. Once I got into better rhythm I was able to keep him further away."
On the prospect of facing Stan Wawrinka in the semi-final: "He has played fantastic this tournament so far. Last year when we met he was playing very well and I had to play one of my best matches on clay to beat him.
"It not always been easy for me here but the last few years have been great.
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
Murray is now into his 21st Grand Slam semi-final where he will face Swiss third seed Stan Wawrinka.
Those two met in the semi-final last year with Murray playing one of his best clay-court matches to reach the final.
Image source, ReutersMurray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
A good work out for the British number one.
He struggled with Kei Nishikori's power early on but fought back impressively.
Another win the bag. The world number one is getting stronger and stronger.
Murray 2-6 6-1 7-6 (7-0) 6-1 Nishikori
All over!
Andy Murray marches on.
Image source, Reuters*Murray 2-6 6-1 7-6 (7-0) 5-1 Nishikori
This looks done and dusted. No more drama to come surely?
Murray fires down another serve and is on the brink.
Two match points...
*Murray 2-6 6-1 7-6 (7-0) 5-1 Nishikori
"Move your legs," shouts Murray in his Scottish tones as he lets two break points slip.
Not this time. He steps in and whacks a return and seals the double break.
The end is nigh.
Murray 2-6 6-1 7-6 (7-0) 4-1 Nishikori*
I've doubted Kei Nishikori once in this match and he came came to break Murray in the following game but he can't have much left here.
He puts two forehands out at the start of the next game and things look like they're slipping away.
Another error. Three break points Murray.
Murray 2-6 6-1 7-6 (7-0) 4-1 Nishikori*
What a difference a strong serve can make.
Nishikori is struggling for cheap points in his own service games but Murray uses his first shot of the rally to race to 40-0.
Nishikori makes a right mess of a simple shot at the net but I don't think he is too bothered, that game already looked out of his reach.
*Murray 2-6 6-1 7-6 (7-0) 3-1 Nishikori
Barry Flatman
Sunday Times tennis correspondent on BBC Radio 5 live
That was another strange point. Murray should have finished it off about three times before he did.
I wonder how much ground both players covered doing that one point?
*Murray 2-6 6-1 7-6 (7-0) 3-1 Nishikori
What a point! Both players in to the net and out again like they're doing the hokey cokey.
Murray just doesn't give up. He keeps the ball in play and eventually Nishikori relents. A break secured for the second time in this set.
Image source, AFPMurray 2-6 6-1 7-6 (7-0) 2-1 Nishikori*
Nishikori has looked unsure on his overheads all day and he fails to put another away before Murray makes him pay by finding the clay by his feet with the next shot.
Murray senses the opening. Wide from Nishikori. Two more break points to Murray.
Murray 2-6 6-1 7-6 (7-0) 2-1 Nishikori*
Barry Flatman
Sunday Times tennis correspondent on BBC Radio 5 live
I thought, given evidence we'd seen in the clay-court season, that if Andy Murray made it into the second week then very good.
Murray 2-6 6-1 7-6 (7-0) 2-1 Nishikori*
Russell Fuller
BBC tennis correspondent at Roland Garros
An outbreak of quality tennis has been reported on the Philippe Chatrier court.
Murray 2-6 6-1 7-6 (7-0) 2-1 Nishikori*
Serve to the rescue for Muzza.
He bangs two pacey efforts that Nishikori can't return.
Wife Kim waves her first in her man's direction and mouths "come on".
Image source, Rex Features