Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds

Harriet Dart has done really well to just relax in this second set, she is playing much freer tennis.

On the other end of the court, you have Katie Boulter who has just become so tight in her game.

After diving for a short ball, Hurkacz is feeling an injury in his knee and the Pole has been limbering at the unfortunate timing of being on set point to tie up proceedings.

This contest has been captivating for all three hours and 20 minutes of it.

Here's the moment Novak Djokovic took the first set.

Right now though it's Jacob Fearnley who's all smiles.

Emily Salley
BBC Sport at Wimbledon

With all these Brits in action at the moment, the Hill is absolutely jam-packed.

There’s hardly a patch of grass that hasn’t been snapped up.

Nick Lester
Former British tennis player on BBC TV

Novak Djokovic looks a bit discombobulated, doesn't he? His co-ordination is a little off.

Brilliant from Jacob Fearnley. He keeps the pressure up with a love-hold.

I love this from the 22-year-old. No nerves. If he does go out, it will be with a bang.

We go to a deciding set on Court One. Harriet Dart was in complete control throughout that set and will be looking to take that momentum into the final set.

Two set points for Harriet Dart after a Katie Boulter lob goes long.

Novak Djokovic gets away with one. Squeaking to a hold after Jacob Fearnley's passing attempt drops long.

We stay level in the second set.

Novak Djokovic takes the next point but Jacob Fearnley won't let him out of the game easily, nailing a crosscourt forehand winner to force another deuce.

Jonathan Jurejko
BBC Sport at Wimbledon

Djokovic briefly thinks about drilling his racquet into the hallowed turf. Don't do that, sir.

The Serb quickly kisses and makes up with the frame, the pair combining as he bangs down an ace to save break point.

Shang Juncheng has gone two sets up over 10 seed Bulgarian Grigor Dimitrov after a second set tie-break.

Dimitrov won in straight sets in the first round but the 33-year-old will have to win in five sets to beat Shang, 13 years his junior.

Mark: Harriet Dart is thinking about the finishing line in this set before it's reached her. The mental side of her game is clearly where she struggles.

Image source, Reuters

Katie Boulter had been given a lifeline with a poor service game from Harriet Dart, but can't take advantage as she then loses serve herself.

That means Dart is now serving for the second set to make it 1-1.

Ace from Novak Djokovic.

Jacob Fearnley challenges, out of hope more than anything else, but the ball is definitely in.

Novak Djokovic nets. Break point Fearnley. Centre Court erupts.

Jonathan Jurejko
BBC Sport at Wimbledon

An exasperated Djokovic huffs and rolls his eyes. That double fault provides a chink of light for Fearnley.

He goes for placement rather than power with his next first serve, then forces his opponent into another error from the baseline.

Djokovic is not comfortable out here. He's mouthing something to his box between points.

It's all happening in this game.

Novak Djokovic slams the door shut at 15-30 with an unreturnable serve down the middle.

He then stays in a monster rally, and benefits from a wayward Jacob Fearnley forehand on the approach.

40-30. But Fearnley comes again with a powerful backhand winner into the corner. Deuce on Djokovic's serve.

Image source, PA Media

Harriet Dart was serving for a 5-0 lead, but her serve vanishes from her in that game, ending it with a double fault to give Katie Boulter her first game of the set.

But Dart only needs to look at the scoreboard to see that she's still the one in charge of the set.

Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds

Katie Boulter needs to try and get the rhythm back into her game by almost playing uncomfortably but still going for her shots.