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World number 132 Roman Safiullin, speaking on court two after beating 24th seed Joao Fonseca: "From the final round of qualifying until now, I've faced super tough matches. I've been saving match points, spending four hours on court each match, battling through five sets. It was super tough, but I'm very happy to perform at this level and finally win in three sets today."

On missing time on the tour because of injury last year and his journey back to fitness: "After the US Open, I had to stop playing to treat my injury. That time was super tough for me because half a year ago I didn't know if I would be able to come back.

"I didn't know, so I'm super happy to be back here."

Daria Kasatkina is on the board! A routine hold.

She clenches her fist. The Court One crowd rises.

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The usual hum on Centre Court is getting slightly louder as spectators begin to take their seats, awaiting the arrivals of Novak Djokovic and Arthur Rinderknech.

Usain Bolt, the 100m world record holder, is in the Royal Box.

And it looks like there's been a proposal in the stands. I presume it was accepted as there are lots of cheers in the stands.

Daria Kasatkina has come to life! Down 0-30, she mixes things up with a drop shot and Naomi Osaka, who was hampered by a slip, can't make up the ground.

The next point, she digs in as the pair exchange belted groundstrokes and eventually gets on top, dragging Osaka across the baseline before unleashing a forehand winner. Osaka applauds before the second bounce.

But Osaka holds to 30 to leave Kasatkina serving to stay in the set.

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Over on court three, Belinda Bencic has taken a huge step towards the fourth round.

The Swiss 11th seed, who reached the semi-finals at Wimbledon last year, is up a break against Russian 19th seed Anna Kalinskaya.

Maz Farookhi
Commentator on BBC Radio 5 Live and BBC Sounds at Wembley

Osaka has started like she really means business. They haven't even played 20 minutes yet and Kasatkina is shaking her head, she has no answers at the moment. Osaka is playing like an absolute bullet train.

BBC Radio 5 Live

BBC Radio 5 Live's coverage from Wimbledon is under way.

TV coverage continues on BBC Two and will also be on BBC One from 14:00 BST.

If there's a match you want to watch that's not being shown on TV, head to the BBC iPlayer where you'll be able to choose from all of the courts at SW19.

A rather inevitable double-break for the 14th seed, who is making light work of Daria Kasatkina. This time, she winds up for a cross-court winner off her forehand wing.

Harry Poole
BBC Sport at Wimbledon

It is one of the best things about Wimbledon that you can be walking past a random outside court and happen upon some of the world's top players practising just metres away from you.

And they don't come any bigger than Novak Djokovic.

It's safe to say youngster Naomi was absolutely delighted to receive one of the balls used by Djokovic during his hitting session with Hubert Hurkacz!

Naomi and her dad are off to Court One today, where she was already super excited to watch Naomi Osaka, Coco Gauff and Jannik Sinner in action.

They're going to have to produce special performances to top this experience, however.

Naomi, her dad tells me, is a very talented player herself. Maybe fans will one day be crowding around these courts hoping to see her practising before a big match at Wimbledon...

Naomi Osaka, who has set up camp on the baseline, has all the time in the world to line up a scorching cross-court backhand. Such a clean strike.

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Daria Kasatkina sticks in a lengthy rally and Naomi Osaka puts a simple backhand into the net.

No mistake with this backhand! Zooooom.

Peter Odgers
Commentator on BBC Two

Simply sensational from Roman Safiullin! The complete performance.

I'm not sure even he would've thought he could play that well on a tennis court. He didn't give Joao Fonseca a sniff.

For the second time in his career, he is through to the last 16. He completely outplayed and outclassed one of the young starts of this sport.

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A let off for Daria Kasatkina. On her second break point, Naomi Osaka opens up the court but her down-the-line backhand drifts wide.

Daria Kasatkina's serve is all over the place.

An 81mph second serve is gobbled up by Naomi Osaka, who wallops a cross-court forehand winner for 15-all.

It's followed by a double fault and then a tame first serve which Osaka once again returns with venom. Kasatkina puts her reply into the base of the net.

John Lloyd
Former GB Davis Cup captain on BBC Two

As Roman Safiullin prepares to serve for the match:

The question would ordinarily be: 'Is he going to blink?'

But I don't think Roman Safiullin has all match.

Emily Salley
BBC Sport at Wimbledon

Daria Kasatkina's serve is one of the weaker parts of her game and Naomi Osaka has took full advantage of that from the off.

The ball makes a lovely ping sound that echoes around Court One as she secures the break with a down-the-line winner.

A breezy hold for Naomi Osaka, sealed with an ace. 11 minutes on the board and the four-time Grand Slam champion leads 3-0.