Andy Murray beats Russia's Karen Khachanov 6-3 6-4 6-4
Briton through to quarter-finals - faces Verdasco or Nishikori
Simona Halep through to quarter-finals
Murray 6-3 3-1 Khachanov*
A break point is only as good as your next service game, my old tennis coach used to say.
Andy Murray knows that, of course he does.
The Briton backs it up with a blink-and-you'll-miss-it hold to love. Textbook.
Image source, AFP
Russell Fuller
BBC tennis correspondent at Roland Garros
Once again, Murray's exceptional defensive skills earned him that break of serve. He forced Khachanov to play one more shot than he anticipated, which turned out be an error, as he set up break point. And the pressure then told on the 21-year-old as he double-faulted.
Image source, AFP*Murray 6-3 2-1 Khachanov
Kim is in the house! Luckily she has brought some shades. Blazing sunshine in Pa-reee.
Andy might as well stick on a pair of sunnies too, he is looking super-cool here.
He piles on the pressure, forcing the Russian into two miscued forehands. Another break point...
Khachanov can't handle it. Another double fault - his third of the match - and Muzza goes a set and a break up.
Image source, Reuters
Dom Inglot
Great Britain Davis Cup player on BBC Radio 5 live sports extra
Khachanov is just such a big, athletic player, especially for a man who is 6ft 6ins tall. In the 1990s you might have played a guy this tall and you would have thought, 'well he isn't going to be able to move well.' But not anymore.
Guys like Khachanov, Isner, Anderson - they can move so well.
Image source, AFPMurray 6-3 1-1 Khachanov*
Murray's serve was untroubled in the opening set - here's the first bit of pressure.
A drop-shot from the Brit is a touch long, allowing Khachanov to sprint forward and deftly guide over a backhand volley for 30-30.
And then he levels again at 40-40 with a backhand winner. Keep calm Andy... That he does, bashing down another ace and going on to hold.
Image source, Reuters*Murray 6-3 0-1 Khachanov
The Daily Mail's Mike Dickson made an interesting point earlier about Murray being able to work out an opponent quickly.
These two have never played each other competitively so the Brit has had to suss out the Russian early, although Murray might have been helped by older bro Jamie having played him in doubles matches previously.
Sure they got their heads together in a pre-match homework session.
Whatever they talked about doesn't help Murray in the opening game of the second set, a backhand winner from the Russian earns a hold to 15.
Image source, AFPMurray 6-3 Khachanov
Piers Newbery
BBC Sport at Roland Garros
That's about as sharp a set as you could expect from Murray - just one unforced error, won every point on his second serve and converted the one break point that came along. Khachanov has drawn a few gasps from the crowd with his power but 12 errors basically gives Murray three games, which is too much against the world number one in this form.
Image source, Getty Images#bbctennis
Ally Siu: Khachanov is making some superb shots, but Murray is returning with his own quality shots!
Image source, AFPMurray 6-3 Khachanov
Jonathan Overend
BBC Radio 5 live sports extra commentator
That is an ultra-efficient set of tennis from Andy Murray. It's routine.
There was a lot of stuff thrown at him from a dangerous opponent but he soaked it up.
Murray 6-3 Khachanov
Sealed with an ace.
Top drawer from Andy Murray. The world number one makes what could have been a tricky start look easy.
Another hold to love from the Brit is clinched when he hammers an ace - his first of the day - down the middle.
Muzza has barely broken sweat.
Image source, Reuters*Murray 5-3 Khachanov
And protecting his serve is exactly what Khachanov does. Murray gets nowhere near it.
But then he doesn't have to. As long as he holds out in the next game...
Murray 5-2 Khachanov*
Little over half an hour on the clock, Andy Murray is already a game away from the opener.
Khachanov to protect his serve...
Image source, ReutersMurray 5-2 Khachanov*
Khachanov is a little rattled after losing the break, his mind telling him to play a drop-shot from the back of the court, his body not being able to execute it.
Murray gallops into a 40-15 lead, then shows the young pretender when and how to execute the perfect drop.
The Russian scrambles, Murray lobs him, the ball comes back (twice), the Brit eventually seeing him off when he batters a smash into the clay and off to safety.
Someone bring a pitch-mark repairer...
Image source, Getty Images
Mike Dickson
Daily Mail tennis correspondent on BBC Radio 5 live sports extra
Murray is an absolute master of working out a player as he goes along, working out the best tactic to use against his opponent.
Khachanov is a real handful but Murray has looked pretty sharp.
#bbctennis
Jamie Taylor: Is Khachanov using Del Potro's kit he left in the locker room from Saturday?
Ally Siu: Have to disagree with my sister, I reckon Andy will win in three sets!
*Murray 4-2 Khachanov
That's why he is world number one.
Andy Murray produces a wonderful cross-court forehand winner for advantage, and then shows his dogged defensive ability to keep Khachanov at bay.
And a forehand mistake from Khachanov coughs up the first break of the match.
Advantage Andy!
Image source, ReutersRussell Fuller
BBC tennis correspondent at Roland Garros
Aside from double-faulting with his opening serves, Khachanov does not look at all over-awed by his debut on the Philippe Chatrier Court against the world number one.
He is giving the ball a ferocious belt, and has had the presence of mind to allow two of Murray's trademark lobs to bounce first - before smashing them away and dislodging at least the top layer of clay.
Image source, ReutersMurray 3-2 Khachanov*
Chance Murray? Half a chance. The world number one edges 30-15 ahead, but makes his first unforced error of the match - a rather unopportune time - with a heavy backhand.
30-30...another sniff for Murray. Khachanov on his second serve, Murray digs back, but the Russian hammers down a forehand winner.
Bu then.. a double fault from Khachanov and we go to deuce...
Image source, Getty ImagesA Real Madrid fan living in Barcelona? Brave. He's going to be enjoying himself in Catalonia after Saturday's win...
Murray 3-2 Khachanov*
Piers Newbery
BBC Sport at Roland Garros
Khachanov had his first encounter with the British media on Saturday after he beat John Isner to set up this Murray match, and we learned - it's pronounced Ka-REN, he's a Real Madrid fan, even though he's from Moscow and has trained in Barcelona for the last three three years, and he used to be a demon chess player as a kid.
Image source, Reuters