Postpublished at 14:57 British Summer Time 5 June 2018
*Zverev 4-6 2-6 1-5 Thiem
Alexander Zverev pops a backhand long.
0-15.
Novak Djokovic loses to unseeded Italian Marco Cecchinato
World number 72 wins 6-3 7-6 (7-4) 1-6 7-6 (13-11) to reach semi-finals
Djokovic struggled with shoulder/neck problem early on
Austrian seventh seed Dominic Thiem beats Alexander Zverev 6-4 6-2 6-1
German second seed Zverev had hamstring problem
Madison Keys beats Yulia Putintseva 7-6 6-4 in women's quarter-finals
Sloane Stephens beats Daria Kasatkina 6-3 6-1
Michael Emons and Alex Bysouth
*Zverev 4-6 2-6 1-5 Thiem
Alexander Zverev pops a backhand long.
0-15.
Marco Cecchinato v Novak Djokovic
Novak Djokovic has just started his quarter-final against unseeded Italian Marco Cecchinato, who has already beaten 10th seed Pablo Carreno Busta and eighth seed David Goffin.
Djokovic won this event in 2016, will 2018 be his year as well?
*Zverev 4-6 2-6 1-5 Thiem
Dominic Thiem closes out.
He's a game away from the French Open semi-finals...
Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra
Zverev must have a bit of adrenaline because the hamstring is not holding him back when he has to do the full court sprints.
No doubt there's mental fatigue as well from playing so many five-set matches.
Zverev 4-6 2-6 1-4 Thiem*
Wonderful from Thiem, who responds to a Zverev framer with a spinning short ball that drags Zverev in before rasping a backhand into the space vacated by the giant German.
Deuce.
Zverev 4-6 2-6 1-4 Thiem*
A Thiem backhand miscue. Break point Zverev.
Zverev 4-6 2-6 1-4 Thiem*
Zverev eyes up the winner down the line, but slaps a forehand long. He gets his eye in with a passing backhand winner, though.
30-30.
Zverev 4-6 2-6 1-4 Thiem*
Dominic Thiem still having to work a touch to see this out as he sends a forehand long.
15-15.
Zverev 4-6 2-6 1-4 Thiem*
Another break point, another save from Zverev. A thumping forehand does the trick this time.
He nonchalantly coaxes a waist-height volley just beyond the net to make it advantage, and then slices a backhand winner down the line to hold.
Still a bit of showboat left in the youngster.
*Zverev 4-6 2-6 0-4 Thiem
Alexander Zverev saves the first. And he gobbles up the second too, dropping a delightful volley beyond the reach of Dominic Thiem.
Deuce.
*Zverev 4-6 2-6 0-4 Thiem
And it's two break points again for Thiem.
*Zverev 4-6 2-6 0-4 Thiem
Double fault from Alexander Zverev. That second serve barley reached the net.
Dominic Thiem clubs the next one away like he's hitting a home run.
Zverev then musters the energy to scuttle to the net, but drops a volley wide.
15-30.
*Zverev 4-6 2-6 0-4 Thiem
A hold to love for the Austrian. Zverev barely moving.
Zverev 4-6 2-6 0-3 Thiem*
Thiem rattles his way to 30-0, make that 40-0 as Zverev is reduced to walking pace.
Jonathan Jurejko
BBC Sport at Roland Garros
In other news, things have brightened up. Not for Zverev, but for the organisers and fans who will be delighted to see the Paris sunshine.
Rain and thunderstorms had been predicted but it looks as though we will see this match through to the conclusion without any delay...
Zverev 4-6 2-6 0-3 Thiem*
Zverev looks like he just wants to get through this set and get to the handshake.
It will take something remarkable for Dominic Thiem to not be heading to the semi-finals...
Zverev 4-6 2-6 0-3 Thiem*
And Thiem breaks for the second time in this third set.
*Zverev 4-6 2-6 0-2 Thiem
Thumping overhead smash to scramble back into his service game from Alexander Zverev, but he then drags a straightforward backhand into the tramlines.
Two break points.
*Zverev 4-6 2-6 0-2 Thiem
Double fault from Zverev. That's 0-30.
Leon Smith
GB Davis Cup captain on BBC Radio 5 live sports extra
That's the shot of the tournament from Zverev. He took a long look at the replay just to admire his work. It was worth him staying on the court just for that moment.