Jeremy Bates
Former British number one on BBC Radio 5 live

"It was a courageous performance by Strycova and she took her chances, but Li Na was definitely out of sorts."

Image source, Getty Images

Tense scenes out on Court One as Barbora Zahlavova Strycova celebrates victory against second seed Li Na but has she won yet? Li challenges a call and Hawkeye agrees with the Chinese player.

The point will be replayed, or at least it would have been if Li could get a serve over the net. She double-faults to hand the Czech the match - for real this time - and the biggest win of her career. That's the biggest seed to fall at Wimbledon so far.

John Lloyd
Former British number one on BBC TV

"It was a good effort from Djokovic. There was that very hard fall but he got down to business. Overall he will be very happy with his game. Yes he had a couple of lapses of concentration but he just beat a very tough competitor in straight sets and was very aggressive today. You don't want to peak too early, he's not playing at his best yet but he's playing pretty well."

Sam Sheringham
BBC Sport at Wimbledon

"Lovely touch from Jo-Wilfried Tsonga after booking his place in week two with a straight sets win over Jimmy Wang.

"After skipping across the court in trademark celebration, he gives his towel to a woman who he accidentally hit in the face with a ball during the match.

"'I'd want more than a towel,' quips a lady behind me. 'I'd want dinner.'"

Jo-Wilfried Tsonga, after two hangover five-setters, finally earns a day off polishing off a straightforward win over qualifier Jimmy Wang.

It will be Novak Djokovic up next for the Frenchman. Those big booming forehands might test out the extent of the top seeds shoulder issue.

Simon looks up to the sky in search of answers as he sends a backhand skating into the tramlines and give Djokovic match point. The Serb takes it, putting away a smash and punching the air in celebration. He gives is team a stare and then waves to the crowd who are upstanding.

Djokovic eases through his service game to 15 and is now within one game of victory. The Serb will be keen to get this match over and done with sooner rather than later.

Image source, Getty Images

Earlier in this set, Novak Djokovic took a tumble, clenching his left shoulder in agony. The Serb got up gingerly and called the trainer for a medical timeout. He worked Djokovic's shoulder for three minutes and it looks to have done the trick for now.

Judy Murray
Great Britain Fed Cup captain on BBC Radio 5 live

"Djokovic is the original rubber man. Like Andy he relies on his movement for his best play. He knows he just needs a couple more games to get through and then he'll have two days off."

Two break points for Djokovic as Simon hits his 26 unforced error of the match. But the Frenchman regroups, gets two first serves in and clinches the game.

Novak Djokovic says he is still looking to improve the mental side of his game after defeats in his last three Grand Slam finals.

Before the tournament, he told BBC Sport: "I have had experiences with psychologists. But right now I don't have one. I look at books about sports science and sports psychology so I try to educate myself in that field of life. I am trying to improve and look out for something that can give me that edge.

"But at the end of the day, you can read as many books as you like, talk to as many people as you like but you have to be the one who plays a lot of matches, understands what your strengths and weaknesses are and overcomes the pressure."

Caroline Wozniacki, external, who beat Ana Konjuh to progress to the fourth round, on Twitter: Into the 4th round at Wimbledon! Game feels in great shape! Now 2 days off before the next match :)

John Lloyd
Former British number one on BBC TV

"Djokovic has played well in patches but very rarely do you play seven perfect matches in a Grand Slam. He's lost his concentration a couple of times but he has bounced straight back. He'll cut out the mistakes as he progresses further in the tournament."

Djokovic eases through his service game to 15, his shoulder seems to be OK at the moment. He chooses not to call out the trainer at the changeover.

Martina Navratilova
Nine-time Wimbledon singles champion on 5 live

Image source, Getty Images

"Simon needs to put pressure on Djokovic. Take some shots early, take chances."

John Lloyd
Former British number one on BBC TV

Image source, PA

"I think Djokovic's concentration will be heightened now. He wants to get this match over with quickly."

Djokovic's medical timeout is over and they resume at 30-40. Simon saves the break point and then wins the next two to level things up.

Andrew Castle
Former British number one on BBC TV

Image source, Getty Images

"By the time he rolled over on his back the second time he was already grimacing. My first thoughts are it can't possibly be dislocated and I don't think they would be manipulating it quite like that if it was. I don't mean to be ungenerous but this is a combative sport, Andy Murray is playing later and they are in the same half. But it's certainly a dramatic moment in the championships."

Tim Henman
Former British number one on 5 live

"Djokovic looked in a lot of discomfort when he fell and then walked up to his chair. Sometimes people don't realise how hard these courts are. They see the lovely green grass and think they are soft. They are not. They are like concrete. Once the trainer has diagnosed the problem he'll then have three minutes to treat Djokovic."

Djokovic lies down on his back while the trainer works his left shoulder hard. The Serb grimaces.