That is for tomorrow. Tonight belongs to Carolina Wozniacki and Serena Williams. Best buds? There's nothing like a Grand Slam final to test a friendship. Goodnight.

But before then, there's the small matter of the men's semis, taking place on a super Saturday in NYC. Novak Djokovic v Kei Nishikori, followed by Roger Federer v Marin Cilic. A Wimbledon final repeat, or will the upstarts crash the party? It kicks off tomorrow from 17:00 BST.

Jill Craybas
Former WTA Tour professional on BBC Radio 5 live sports extra

"Even after having 17 Grand Slam titles Serena still appreciates every time she is out here. She has such a positive attitude and loves this kind of atmosphere. The criticism she has had this year about her form may be a motivating factor for her."

Image source, AP

So, a year on from her last Grand Slam final, Serena Williams is there again. After a disappointing year in the majors, Williams will attempt to tie the 18 Slams of Chris Evert and Martina Navratilova. That's for Sunday, and a battle with her great mate Wozniacki.

Serena Williams: "It feels so good. I am so happy. I didn't think I would be here today. I don't know what to say.

"I know she's so aggressive, so I was really focussed. I just tried to win, I don't know.

"Playing all summer has given me a lot of confidence. You have no idea what this means to me, I'm really excited.

"Caroline wants to win and I want to win. Regardless, I'll be happy with the outcome. She's a great girl, we've been looking forward to this since the draw came out. We'll have a lot of fun."

Jill Craybas
Former WTA Tour professional on BBC Radio 5 live sports extra

"Serena played so well from the start and dominated. She knows Makarova is a good player and that's why she came out so strongly. I just think Makarova could have pushed Serena more from the start."

Image source, Reuters

"I am a champion and you're gonna hear me roar" is the song on the public address system. Today, Ekaterina Makarova heard Serena Williams roar. A Makarova backhand wide completes the demolition job and Williams is in to her eighth US Open final. Caroline Wozniacki would have been best off not watching that.

Image source, Getty Images

New York, normal service is resumed. Makarova may be playing her best tennis of the match, but Williams has gears to go through. A backhand to the shoelaces, a Makarova error. It's match point to Williams.

Image source, Getty Images

Jill Craybas
Former WTA Tour professional on BBC Radio 5 live sports extra

"It can happen when you are so far behind that the pressure is off and you can start swinging away and start making a few points. It would have been interesting if she had started the match like this."

The court covered in clouds, Williams batters down one unreturnable, the punishes the ball with a series of forehands. Hang on, though, what's going on here? Williams wavering, a long backhand giving away a break point. This isn't right? Serena into the net. Makarova breaks. Tell that taxi to wait.

Hmmm, Makarova may be done here. 30-0 up, but a wild forehand and a too-cute drop gets Williams back to 30-30. Nope, the Russian lives on thanks to two Williams net-disturbers. Surely only a delay of the inevitable. Williams to serve for the match.

Image source, AP

Williams, the most dangerous creature you will ever see in pink leopard print, has the balls on her racquet and the wind at her back. She pulls Makarova from side to side, asking the Russian to chase balls that have already flashed past. Hold to 15 completed with an ace, demolition job almost complete.

Image source, Usain Bolt

Usain Bolt, the fastest man on earth, is watching Serena Williams from the comfort of the players' box. He has tweeted this picture, external above with the message: Champion in action @SerenaWilliams

At the moment, you'd say Makarova has done well to have nought in this second set. Williams is yet to drop a point on serve and two backhand errors have Makarova 0-30 down. Brief respite, but another Russian error gives Serena two break points. A failed attempt at a one-legged, leaning backhand at least shows Williams is human, with a Makarova bomb of her own clawing it back to 40-40. When Williams goes long, Makarova halts a run of nine games against her with a string of backhands. The Russian is on the board.

Image source, AP

New York is five hours behind us good folk on BST, so it's just past 17:00 in the Big Apple. Is something good on the telly at 18:00? Repeat of Friends maybe? Williams will get to see it, because this is exhibition stuff now, another run to the net, a tricky put-away, a backhand winner completing a hold to love. Formidable.

Jill Craybas
Former WTA Tour professional on BBC Radio 5 live sports extra

"Makarova is looking over to her box, throwing her arms up in the air, and looking to her coach because she doesn't know what to do. Serena Williams has played well this tournament but this is the best I have seen her play so far."

Even the sound of ball on racquet is more violent when the strings make contact. Makarova serving, but she may as well be under-arming them over the net. Williams gobbles up the first of two break points. Don't worry Ekaterina, there's perhaps no other woman in the history of the game that could hang in there with Williams in this mood.

There's someone sitting next to the chair umpire (a woman, I think), holding what looks like a camera that stays entirely focused on the flight of the ball. What's that all about? Meanwhile, Williams continues to punish the ball. Ace. 121mph. Casual. Follow that up with another. Hold to love. Put the showers on, they'll be there soon.

Jill Craybas
Former WTA Tour professional on BBC Radio 5 live sports extra

"Serena has more unforced errors but she also has more winners. That shows she's the aggressor and is taking the game to Makarova. What is amazing is she is so strong but is also so fast around the court."

Into the net this time. Williams breaks at the earliest opportunity, a final place seemingly a case of when, not if.