That's all from us tonight/this morning.

Check out JJ's report on that match here and catch-up on Rafa Nadal's victory, which happened earlier today.

We've got another thrilling line-up tomorrow - British number one Johanna Konta is up against Czech third seed Karolina Pliskova.

Before that, Roger Federer is in action, as well as Serena Williams, Novak Djokovic, Elina Svitolina and Ash Barty.

Coco Gauff is also back in the women's doubles.

Join us from 17:00 BST for coverage of Federer's match against Belgian 15th seed David Goffin, which opens Arthur Ashe. See you then!

Gigi Salmon
BBC Radio 5 Live

It was like a One Direction in Coco Gauff's first doubles match, it's incredible - she is very good for this sport. We ended on a positive, she still has the doubles to go.

Coco and Osaka hug once more before the teenager heads down the tunnel. Osaka goes over to the crowd to sign some giant tennis balls and take a few selfies.

These two are just awesome aren't they?

"I don't think I'm a mentor," Naomi Osaka jokes. She then turns to Coco's box and says a few words - "I don't want to cry either".

"You guys raised an amazing player. I used to see you guys training in the same place as us. The both of us made it and are working as hard as we can. I think you guys are amazing and Coco is amazing.

"I think this is the most focused I have been since Australia. (Turns to Coco) I am sorry for playing you in this mentality. It was super fun.

"(To the crowd) Thanks for coming out, the energy was crazy even though it wasn't really for me!

"I have watched her [Coco] play a couple of times and always thought she was an incredible mover. It was an incredible atmosphere too.

Asked about her next match: "My brain's not working anymore, sorry."

Here is an emotional Coco Gauff: "She (Osaka) told me that I did amazing and good luck and asked if I could do the on-court interview with her, I said 'no' because I knew I would cry the whole time, but she encouraged me to do it.

"It was amazing, she did amazing and I am going to learn a lot from this match. She has been so sweet to me, so thank you for this."

On her doubles match coming up: "I'm super excited and I love playing doubles. Once again thank you Naomi, I don't want people to think I am trying to take this moment away from her because she really deserves it."

Coco is going to join Osaka at the net for an on-court interview too. What a lovely, lovely touch from Osaka.

There's a warm embrace at the net as Osaka comforts Coco. The 21-year-old (yes, she's young too!) walks over to Coco's chair and gives her some words of advice.

"I'm going to cry", says Coco.

"No, no. It's better to do it here than in the showers on your own."

Coco gets the return in play but a sloppy forehand follows. 15-0.

Osaka cries "come on" as she opens up her body and hits a clean forehand into the corner. 30-0.

The defending champ hits a big wide serve. 40-0.

Three match points.

The Empire Inc: Two of my favorites playing! Osaka vs Coco. Win or loose both are role models.

Gigi Salmon
BBC Radio 5 Live

Naomi Osaka is playing a clean, clean game of tennis.

She is the winner of two Grand Slam titles but I cannot tell you the buzz there is around Gauff, there are rows and rows of people in her box - it's like a circus following her.

She's come through two rounds to get to this stage and what has impressed me is how she has looked strong and focused - she would be a great poker player.

It's quite incredible. She's very intelligent, she is a 15-year-old on one level but is very mature.

She hasn't played badly, but she is playing the world number one. She is a star of the future and we will see so much more of Coco Gauff.

Break point...

The world number one takes it as Coco pulls a backhand into the net. She will serve for the match now.

Nice! A sliced drop shot deceives Osaka but Coco then pulls her backhand long. The American responds with a stunning backhand down the line.

It's probably her best shot of the night! "COME ON!" she screams.

Uh-oh. Another double-fault. Her seventh. Back to deuce...

The 'full house' crowd collectively roar as Coco smashes a winner. Osaka's lob then has too much on it and the Japanese clutches her racquet behind her head.

A fourth double-fault deflates the crowd and Osaka pounces, moving up the court before edging a volley over the cords. 30-30.

No stopping this. Osaka serves big out wide then drops an ace down the T. Coco challenges to no avail.

This will help! Coco hits a clean forehand winner and raises a small fist. Osaka's backhand drops inches wide but the top seed then smashes an ace.

Coco responds with a superb backhand - roaring herself on as she slaps her thighs. Deuce.

Kristie Ahn beat Jelena Ostapenko yesterday to reach the US Open fourth round for the first time...

15-year-old Coco Gauff is, understandably, feeling the pressure on Arthur Ashe. She's a set and two breaks down against the world number one and defending champion.

It will take something truly special for her to come back. But she's still so young!

We've not seen this often. Coco is struggling to cope. She looks up helplessly as Osaka gets the break at the first time of asking.