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

This match will heat up if we get to a fifth set or something happens dramatically. This third set is huge because usually whoever wins it goes on to win in a best-of-five.

Zverev won 94% of points off his first serve in set one, but it dropped to 70% in the second.

The longer this set stays on serve, the more you suspect it will benefit the German.

Djokovic meanwhile will look to play the disruptor - a role he often fills so well.

This set has gone entirely to serve so far, as Zverev again holds to love.

That's 12 consecutive points won on serve to open set three.

Djokovic continues to dominate at the net, mixing up lobs and passing shots before winning points with dinked volleys after Zverev has been forced to scramble back.

The Serb holds to love.

Zverev holds to love.

Will he emerge refreshed into this new set?

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If you're only following this live text, I urge you to seek out a replay of the set-ending rally won by Djokovic there. Terrific stuff - he even had to save it after Zverev got a huge net cord deflection.

Back on court, Zverev will serve to open set three.

Djokovic spurns the first break point with a drop shot that curls agonisingly into the tram-lines. He berates himself thoroughly for that one, with plenty of gesticulating.

And the second is saved by Zverev with a wonderful passing forehand winner. That's one of very few good forehands we've seen from the German in this set.

But Djokovic takes the third with the best point of the match! A remarkable rally featuring every shot you could imagine, won with a feathered drop shot that Zverev just cannot quite reach.

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Novak Djokovic has been in this scenario many times before. So has Alexander Zverev - more worryingly for him.

Zverev's head goes down as he plants one into the net to give Djokovic three set points.

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Zverev's unforced error count in this set ticks into double figures, his level has dropped in set two.

He does enough to hold serve here, but Djokovic has looked much more comfortable in this set and will serve for it next.

Daniela Hantuchova
Former world number five on BBC Radio 5 Live and BBC Sounds

It almost feels like Novak Djokovic has got to just keep attacking that forehand corner of Alexander Zverev.

He almost needs to say: 'OK, if you want to beat me tonight then it will have to be with your forehand.'

That's how Zverev started this match in the opening set but the question is whether he can keep it up.

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Away from nursery rhymes and back to the tennis.

Zverev, after his fly snack, raises his hands in frustration at an overhit forehand.

Djokovic holds.

Jonathan Jurejko
BBC Sport senior tennis reporter at Roland Garros

The changing body language mirrors the turnaround of scoreline.

Zverev is now trudging across the baseline with head bowed and gold chain between his teeth.

Djokovic is animatedly marching around and rallying the troops.

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Between the final two points of that previous game, Zverev suddenly bent double and looked a little uncomfortable.

Nothing serious - replays appear to show him accidentally swallow a fly that was buzzing about Phillippe-Chatrier.

Quick, someone find a spider to catch the fly.

Zverev is able to get on the front foot and fend off Djokovic for now with a nice drop shot of his own.

Advantage is secured with Zverev's second ace of the match, then the game with an unreturned serve.

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This is vintage Djokovic - a brilliant cross court back hand winner, followed by a gesture rousing the crowd. He's still a showman.

Djokovic advances to the net, forcing Zverev right on the defensive, and moves a point away from a double break...

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

Alexander Zverev will be disappointed with his returns on this deuce side.

If I was him, I would have changed my stance and given Novak Djokovic a little different target. He could've either moved up a little bit or taken the wide serve away.

I'm quite shocked that neither Zverev nor anyone on his team have thought to make a change on that deuce side.

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It remains one of the great anomalies of modern tennis that Alexander Zverev has still never won a Grand Slam title.

Three final defeats, including at last year's French Open, plus six semi-final exits.

Once the great coming youngster, Zverev is now 28. Will this be the year he finally makes good on all that hype and promise?

Djokovic responds with an unreturnable serve, as the clock ticks past nine minutes in this game.

Zverev meanwhile is complaining about the spidercam being too low, for the second time in this match.

Advantage Djokovic for a third time - and he makes it count this time, with an ace!

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In a role reversal from the first set, Zverev is now hitting more winners but also making more unforced errors.

Djokovic however is not perfect himself, sending a couple of shots long as we go to a third deuce of this game.

This is the longest game of the match so far, approaching eight minutes and counting.

And now Zverev has a break point...

Zverev responds to being broken by trying to beat Djokovic at his own game - advancing to the net and playing a gem of a volley which again leads the Serb to tap his racquet in appreciation.

And another thumping forehand breaks Djokovic's defences to take us to deuce...

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