Thank you for joining us today. You can find all the reports from a packed Wednesday of action on the tennis section of the BBC Sport website.

We'll be back tomorrow for the women's semi-finals with our live text coverage commencing at 14.00 BST.

Hope to see you then.

• Novak Djokovic saw off the challenge of third seed Alexander Zverev to keep alive his hopes of a 25th Grand Slam singles title.
• Djokovic will face world number one Jannik Sinner, who beat Alexander Bublik in straight sets to book his semi-final spot.
• World number 361 Lois Boisson created another huge upset to reach the semi-final of the women's singles, beating sixth seed Mirra Andreeva in straight sets.
• Her semi-final opponent on Thursday will be Coco Gauff, who came through an all-American quarter-final with Australian Open champion Madison Keys.
• British duo Neal Skupski and Luke Johnson were beaten in the mixed doubles and men's doubles respectively, but Alfie Hewett and Gordon Reid progressed in the wheelchair doubles and fellow Briton Andy Lapthorne won his quad wheelchair quarter-final.

This will be Novak Djokovic's 51st Grand Slam semi-final. He has a 38th final in his sights, and a 25th title.

His victory over Zverev was his 387th win at Slams.

The man is a machine.

Novak Djokovic is speaking to the crowd on Court Philippe Chatrier in French. He says at the age of 38, playing in matches like that one with Alexander Zverev is one of the main reasons why he still loves to compete at the top level.

Where was that match won? Three areas stick out.

Djokovic won it at the net. His drop shots were excellent, and in the final set he won nine of 13 points at the net - 69%, compared to 30% by Sinner.

Zverev lost it with his forehand. He sprayed too many wide at key moments, and it remains a fundamental flaw in his play.

And finally, it was won and lost mentally. Zverev, particularly in set three, checked out and let his head drop. Djokovic, as almost always through his stellar career, ploughed on through.

Image source, Getty Images

Novak Djokovic just keeps going, and going, and going.

He will face the number one seed Jannik Sinner in the semi-finals. That's a must-watch, if ever there was one.

Alexander Zverev makes a very swift exit from the court. Yet another chance for that maiden Grand Slam triumph come and gone.

He's still only 28, but how many more chances will he get?

Unreturned serve.

A fifth match point.

Alexander Zverev will not go!

Great defensive tennis, huge effort, and won with an overhead slam.

Four match points saved by the German.

Another serve and volley.

Match point quatre to Monsieur Djokovic.

Backhand into the net from Djokovic!

He spreads his arms wide in frustration.

Perfect serve and volley. Djokovic cups his ear.

Match point number three.

Zverev saves the first match point.

And a fearsome overhead strike can't be defended by Djokovic!

Match points saved, we go to deuce.

Another Djokovic drop shot... this time into the net.

Then a long rally, Djokovic having to go right on the defensive with some loopers from behind the baseline. He gets back into it, plays the drop shot, and Zverev can only watch as Djokovic finishes off into the empty court.

Djokovic waves his racquet aloft. Two match points.

Yet another drop shot from Djokovic, Zverev nearly gets there but his shot hits the net cord and comes back on the wrong side.

We are well beyond the three hour mark. But how much beyond shall we go?

It's in Novak Djokovic's hands - and he kicks off with an ace.

Greg Rusedski
Former British number one on BBC Radio 5 Live and BBC Sounds

Interesting to see Novak stretching out his hip flexors on both sides. That's not a good sign towards the end of a match but hopefully there's nothing wrong except a little bit of stiffness.

So, Zverev needs to hold serve to stay in the French Open.

He does so to 15.

Over to you, Nole. Win this game, keep your serve, you go through.

Jonathan Jurejko
BBC Sport senior tennis reporter at Roland Garros

There was an incident in the crowd just behind the umpire's chair.

Not sure what the issue was exactly but you could hear a verbal exchange going on.

Security officers quickly moved in and escorted a man out of the stadium.

Drama over. Game on.