Novak Djokovic is batting it around with some serious intent now.

A couple of cross-court winners draw big reactions from the Centre Court crowd as he gets to 40-0. Djokovic almost gets the hold to love with a drop shot but Stefanos Tsitsipas covers the ground quickly and the Serb can't get it back over.

A hold to 15 it'll have to be.

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Stefanos Tsitsipas is the victim of an awkward bounce on the baseline. The Greek trails 30-0 on serve as he hits an air-shot and glances down at the rugged turf below his feet.

Tsitsipas gets back to 30-30 before outlasting Novak Djokovic in a 15-shot rally and then completing the turnaround to hold with an ace.

Sam Querrey
Former world number 11 on BBC One

The one thing Stefanos Tsitsipas is doing well is serving. He's had Novak Djokovic guessing before contact on a couple of occasions.

Just then, Djokovic guessed to go out wide and Tsitsipas burned his serve down the T.

A swift response from Novak Djokovic.

The Serb smashes home an ace to seal the hold to love.

Andrew Castle
BBC Sport tennis commentator on BBC One

Stefanos Tsitsipas has hit 14 aces over just one hour and 10 minutes here.

He is trying to do all the right things here. He clearly isn't looking for any extended rallies.

Novak Djokovic does not want to come back tomorrow morning to finish off this match - he's opened up a two set lead in just 65 minutes.

Stefanos Tsitsipas ropens up a 40-0 lead in the opening game of the third with an ace before wrapping up the hold to 30.

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Sam Querrey
Former world number 11 on BBC One

Stefanos Tsitsipas must be feeling defeated inside right now, especially after how the ninth game of this second set ended.

I like the fact that he is leaving the court and changing his clothes though. It makes me think that he believes he can maybe win this second round match.

You've got to fake it until you make it!

Stefanos Tsitsipas plants his forehand into the net, picks up his bags and exits the court. Don't panic - he's coming back...

Novak Djokovic, who stole a break in the ninth game, leads by two sets to love.

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In the blink of an eye, Novak Djokovic is a point away from a two-set lead.

Stefanos Tsitsipas had two opportunities to kill that point but both of his overheads are quite grim.

Novak Djokovic drives him back to the baseline with a looping reply off the second before chasing down a wide forehand and fizzing his reply along the same trajectory. Tsitsipas' attempted short reply finds the net.

Huge.

Stefanos Tsitsipas flays a wild forehand long and wide.

Down advantage, Novak Djokovic wallops a forehand winner, his racquet finishing in the textbook over the shoulder position. Hold the pose.

A rare moment of pressure on Stefanos Tsitsipas' serve as a couple of unforced errors leave the game poised at 30-all.

Tsitsipas responds with an ace but then shanks a forehand off a deep return.

This would be a huge moment for a break if Novak Djokovic can pull it off.

Sam Querrey
Former world number 11 on BBC One

I think that was more of a trip than a dive!

Part of being a good athlete is actually falling in the correct way when you notice you might twist your ankle. It is better to go down with it rather than taking the strain with that full ankle turn.

As long as he keeps hitting aces, he doesn't have to move around the court which is a bonus!

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Novak Djokovic stretches to his right to ping a backhand volley winner cross-court but goes over on his right ankle in his follow through.

He gets back to his feet a little gingerly but then unfurls back-to-back aces to hold to love.

Novak Djokovic is doing some funky communicating with his box at the change of ends. He twirls his index fingers around one another and looks quizzical. No idea.

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Stefanos Tsitsipas holds to 15 with an ace and marches back to his chair with a bit of pep in his step.