So we have one singles final decided - a first Grand Slam title for Japan's Naomi Osaka. It's been a fascinating tournament - thanks for your company!
Serena Williams - Naomi Osaka
US Open women - 8 September 2018
US Open – Follow the Tennis match between Serena Williams and Naomi Osaka live with Eurosport. The match starts at 22:00 on 8 September 2018. Our live coverage lets you follow all the key moments as they happen.
Head-to-head: see historical stats and visit our detailed profiles for Serena Williams vs Naomi Osaka. Get all the latest on Tennis: fixtures, results and tables.
That was an emotional trophy ceremony, with Osaka finding it difficult to speak, and Serena - to her credit - telling the crowd to calm down and stop booing and congratulate the winner.
Osaka has gone to her team and her mum has dissolved in tears. The two are just holding each other and sobbing.
Umpire Carlos Ramos has been escorted off court - he won't be there for the post-match presentation.
Osaka is weeping, possibly with stress as well as sheer happiness.
There's a nice hug between Osaka and Serena at the net - the 36-year-old holds out her arms to the younger woman. Osaka shakes hands with the umpire, Serena has a go at him again.
WILLIAMS 2-6 4-6 OSAKA: Serena has to gather herself as Osaka prepares to serve for the championship - she's been at her seat weeping into a towel. But Osaka is composed, and that serve has been absolutely on the nail all night - she serves an ace to set up double championship point. A forehand down the line from Serena saves one of them - and then an ace gives Osaka her first ever Grand Slam title.
She's still crying.
Serena walks off court to talk to the supervisor again.
WILLIAMS 2-6 4-5 OSAKA: People are booing even when Serena gets a let call. This is absolutely ridiculous. Venus is on her feet cheering her little sister on.
It's Serena to serve, then. The crowd are up in arms.
Serena is now 5-3 down in the second, and she's called for the referee. She's in tears. "This is not fair." The crowd are booing some more.
Serena has been complaining that the coaching violation casts aspersions on her character - but refuses to accept that the verbals she's been dishing out does the same to umpire Ramos.
"You stole a point from me. You're a thief too." And then she gets another violation - and a game penalty.
Serena is still shouting at umpire Ramos. "You owe me an apology. Say it. Say you're sorry."
WILLIAMS 2-6 3-4 OSAKA: That's the break for Osaka! She sends a fizzing passing shot past Williams to take the game.
WILLIAMS 2-6 3-3 OSAKA: Osaka serves out to love and is looking unbothered at the moment.
The crowd are booing, Serena shushes them, and Osaka has to pull things together to serve.
Serena is now screaming at chair umpire Carlos Ramos: "You owe me an apology!"
Want to see Serena get angry about her coaching violation?
WILLIAMS 2-6 3-2 OSAKA: Osaka breaks back as Serena's service game is littered with faults. Williams then smashes her racquet on the court, and gets a code violation and a point penalty. Serena is currently at 49 per cent on her first serves.
WILLIAMS 2-6 3-1 OSAKA: Osaka responds to a fired-up Williams taking a 0-30 lead with a lovely ace and a great forehand winner. A brilliant 19-shot rally saves break point, and she saves her next with a 112mph ace - this is exceptional tennis. But there are a few errors creeping into Osaka's game, and Williams capitalises.
Serena is still fuming about the coaching violation. She doesn't use coaching on-court when she's on the tour, but she's penalised for what her coach has done.
WILLIAMS 2-6 2-1 OSAKA: Osaka is happy to play these serves from Serena all day - she's not scared of speed or power. Williams saves the break point and the crowd go wild, and they go even wilder after she wheels out a cheeky dropshot over the net.
Looking at Patrick Mouratoglou, though, it does seem as if he made a signal to her to move up the court.
WILLIAMS 2-6 1-1 OSAKA: Williams gets a warning for coaching - which she says was a thumbs-up signal - and she gets very cross with umpire Carlos Ramos: "I don't cheat to win. I'd rather lose."
WILLIAMS 2-6 1-0 OSAKA: Serena tries the body serve, giving Osaka more to think about.
34 minutes for Osaka to take that first set - five winners compared to Serena's nine, but it's those errors that make the biggest difference.
WILLIAMS 2-6 OSAKA: Osaka is still very deep on the knees when she plays from the baseline, and her serve is vicious. Serena has no answer for this at the moment, clocking up her 14th unforced error, and it's first set to the 20th seed.
WILLIAMS 2-5 OSAKA: Serena is still serving up plenty of faults on that first serve but has polished up the second serve enough to hold.
WILLIAMS 1-5 OSAKA: What a beautiful cross-court forehand Naomi Osaka plays to level at 15-15, applauded by her opponent. First "COME ON!" of the evening from Serena, and there's a little smile playing around Osaka's face - she knows she's giving Williams problems.
WILLIAMS 1-4 OSAKA: That's the double break for Naomi Osaka! Serena is looking up at her camp but there's little they can do. Osaka isn't fussed by Serena's power - and she's moving brilliantly.
WILLIAMS 1-3 OSAKA: Osaka is playing some incredibly aggressive shots almost from a squatting position. She's come to play - this is a fantastic start.
WILLIAMS 1-2 OSAKA: Serena faces break point after a long forehand, and then double-faults to hand the game to Osaka. This is a pulsating start.
WILLIAMS 1-1 OSAKA: Osaka too is a little anxious on serve before finding 112mph on her first, but then a few marvellous groundstrokes take her through.
WILLIAMS 1-0 OSAKA: Serena's serve is looking very tense and tight, and she quickly concedes a 0-30 advantage to her young opponent with faults. She gets on the board with an 89mph forehand winner, and levels up with an ace. She gets to game point by firing past a statuesque Osaka, but the Japanese's good return gets her to deuce. Another ace for the advantage, and a deft forehand to nudge wide and hold.
It's Williams to serve.
Osaka is putting on a smile for the pre-match photos; Serena is looking a tad tense.
Billie Jean King is doing the coin toss for this match.
Here come the players, with their bouquets clutched in their hands.
A massive Stars and Stripes flag has just unfurled across the court, and Deborah Cox is about to sing.
The roof on Ashe will be closed this evening - just in case.
This time last year, of course, Serena was very ill indeed, recovering from the birth of her daughter Olympia. It's been a busy 12 months since then.
But can Osaka beat the great champion? They've only met on court once before - and the 20-year-old came through in straight sets, earlier this year in Miami.
The Williams sisters were a huge inspiration to Osaka when she was growing up - but she's said before that Serena was her favourite because "little sisters have to stick together". No wonder her message to her opponent after her semi-final win was a sheepish "I love you!"
So who's going to win?
Serena's looking for a 24th Grand Slam title - Osaka is looking for her first.
Good evening and welcome to our LIVE coverage of the US Open women's singles final - Serena Williams v Naomi Osaka.