Not another injury?! Kei Nishikori rolls an ankle during a point but still has time to put away a smash of his own. He hobbles back the baseline and the crowd try to lift him.

No sign of an injury there though. K-Nish ensures this set goes on by taking the next point.

Ouch. Novak dumps a regulation smash into the net. We've all been there.

The former world number one is a little irritated. He holds a thumb up to the crowd. I assume he's not happy about someone shouting out while the ball was in the air.

Deuce.

Nishikori might not have chance to have another look at a Djokovic service game in this set.

He's 0-30 down in his own serve. Djokovic is two points from the set.

Djokovic's serve is ensuring Nishikori doesn't have the slightest opportunity in the Serb's service games. Nishikori is going to have to find a way to get more returns in play. He'll have to break at some point to get back on terms in this set.

Just a little wayward from Novak twice in a row and Nishikori wriggles free in this service game. There was a little clench of the fist there from Nishikori. He'll be encouraged by those errors.

Again the players are forced to wait before resuming after the change of ends. There's very little urgency to find your seat in New York.

Djokovic thinks he has found the line with a vicious return but the call goes against him. He looks towards his box to ask whether he should challenge but doesn't get the answer he is looking for.

He's keeping the pressure right on Nishikori though. Deuce.

This match is being played to the tune of the squeaks of both of these players' trainers on the court. They both love to scamper around but at the minute it's Djokovic controlling things. He pulls his opponent out of position before pounding a backhand down the line.

Ashe is filling up and it's properly dark outside now. These two must just look the size of a match stick if you're one of those with a ticket right at the back. Nishikori gets on the board with the help of a lovely volley.

That's better from Kei Nishikori! A delightful drop shot gives the Japanese player 15-30.

But the Djokovic first serve is on absolute fire. When it lands it is right in the corners and too hot to handle. Nishikori is forced a long way back in the court and can't return.

There it is. Djokovic stares at his box as the ball flies wide off the Nishikori racquet.

Nishikori is sweating heavily already.

Relentless from Djokovic. He wants this early break. Nishikori's shoulders drop.

Here's a fifth chance for Novak.

Saved again. Nishikori is going to burn through these shoes if he has to keep running this much.

Eeeek. A shocker of a forehand from Nishikori.

A fourth break point in the game for Djokovic.

The crowd want a contest after missing out in the first semi-final. They cheer loudly as Nishikori saves a third break point.

Deuce.

Two good serves from K-Nish.

One break point left to save.

Kei Nishikori is yet to get going. He hits a forehand long and then is pulled left and right with Novak playing the role of puppeteer.

Here are three break points for Djokovic.

Well that's an imposing start on serve from the former world number one. Nishikori can't return any of Djokovic's first three serves. The man from Japan nicks the fourth point but then reverts to type. His return flies way long.

Novak Djokovic to serve.

Play.

Ashe is still only half full.

The players take a seat for the final time before we begin.

But there's one big problem for Kei Nishikori.

He is on a shocker of a run against Novak Djokovic. He must shudder every time he hears the Serb's name.

Nishikori has lost his last 14 matches against Djokovic since that win in the semi-finals here in 2014.

Ouch.

Image source, Getty Images