GAME, SET AND MATCH! - DJOKOVIC 6-3 6-4 6-2 NISHIKORI. Novak Djokovic books his place in the 2018 US Open final with a ruthless straight sets victory over Nishikori in two hours and 22 minutes. The Serb started well and rarely let up as he outclassed his Japanese opponent, serving out on his second match point from deuce. Djoker will now face del Potro in Sunday's final as he bids for a third US Open crown and a 14th major title overall.
Kei Nishikori - Novak Djokovic
US Open men - 7 September 2018
US Open – Follow the Tennis match between Kei Nishikori and Novak Djokovic live with Eurosport. The match starts at 22:30 on 7 September 2018. Our live coverage lets you follow all the key moments as they happen.
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BREAK! - DJOKOVIC 6-3 6-4 5-2 NISHIKORI. The fat lady has warmed up and is about to sing her chorus of farewell to Kei's US Open hopes. The Japanese saves one break point with his second ace of the match, but fires long off the backhand on the next. Djokovic will now serve for the match and a place in the final.
DJOKOVIC 6-3 6-4 4-2 NISHIKORI. There's just the five winners between Kei and Nole, but it's the Japanese's unforced error count that has the alarm bells ringing. He's now up to 46, and he makes little impression as Djoker lands a crunching first serve to hold to 15. The finish line is firmly in sight.
DJOKOVIC 6-3 6-4 3-2 NISHIKORI. The Serb is fuming as he can't secure the double break from deuce. Nishikori is flailing but he digs deep to keep his fading hopes alive a bit longer.
DJOKOVIC 6-3 6-4 3-1 NISHIKORI. Djokovic consolidates emphatically with an all-too-easy love hold. Kei getting desperate and he's starting to leak cheap errors, gifting Djoker easy points.
BREAK! - DJOKOVIC 6-3 6-4 2-1 NISHIKORI. This one looks almost done. Djokovic breaks to 15 before walking to his chair with composed clenching of the fist. He's firmly in control with complacency the only real threat to him not winning this match in straight sets.
DJOKOVIC 6-3 6-4 1-1 NISHIKORI. Novak overcomes a mini blip from 30-30 to breeze through the next two points and get on the board. The 13-time Grand Slam champion seems to have hit a slight lull since the break, but Nishikori still doesn't look like changing the course of this contest.
DJOKOVIC 6-3 6-4 0-1 NISHIKORI. After an extended break where both players ventured off court, Kei returns to make short work of a love hold to make a positive start to the set. Novak's level dipped off a bit there with a couple of unforced errors.
SET! - DJOKOVIC 6-3 6-4 NISHIKORI. The former world No.1 is one set away from the final as he serves out to 15. Kei has played a big part in an entertaining match to watch, but he hasn't really had the weapons or consistency to suggest he can truly get under Djoker's skin.
DJOKOVIC 6-3 5-4 NISHIKORI. Special K bites back from 15-30 down to pose the serve-out question to the Serb. Over to you, Novak...
DJOKOVIC 6-3 5-3 NISHIKORI. No look-in again for Kei as Novak finishes him off to 15 with an angled backhand volley at the net. The Serb is one game away from a two-set lead. It's looking more and more likely Djoker will be heading to a Sunday showdown with del Potro for the trophy.
DJOKOVIC 6-3 4-3 NISHIKORI. Kei remains in touch with a hold to 30.
DJOKOVIC 6-3 4-2 NISHIKORI. Kei wins one of the points of the match as he somehow outdoes Nole's elasticity. It doesn't provide the platform he wants though as the Serbinator storms through the next four points to consolidate.
BREAK! - DJOKOVIC 6-3 3-2 NISHIKORI. And there it is! Nole gives himself a real opportunity at triple break point with some sublime returning. Nishikori saves all three, reaching deuce with a wonderful stun volley on the stretch. The Serb refuses to be denied though and keeps battering away at the Japanese's defences, eventually luring a wayward forehand to seal the break.
DJOKOVIC 6-3 2-2 NISHIKORI. A couple of forehand winners do plenty of damage as Djoker eases to parity with a love hold. Despite Kei's improvement, you still sense Novak is waiting for his moment to hit another gear and take a firm grip of this set - and match.
DJOKOVIC 6-3 1-2 NISHIKORI. Kei is beginning to make more and more forays into the net and it's paying off. He puts away two smashes and a forehand volley to keep his nose in front with a hold to 15.
DJOKOVIC 6-3 1-1 NISHIKORI. Djokovic faces his first real test on serve and double faults from deuce to cough up a first break point. The Japanese can't convert as he fires an impatient crosscourt backhand into the net, and then he repeats the trick with a timid forehand on a second opportunity. Novak refuses to offer a third and eases onto the board.
DJOKOVIC 6-3 0-1 NISHIKORI. That's some hold from Special K. He fights back from 0-30 with a quite brilliant defensive, low backhand on the stretch but is then undone by a thunderous BDTL from his opponent. The Japanese defends for his life in some splendid baseline exchanges and swats off FOUR break points before surviving a 13-minute opening game to kick off Set 2.
SET! - DJOKOVIC 6-3 NISHIKORI. Novak concludes a love hold with an ace to serve out the first set in 37 minutes. Nishikori has to raise his level considerably and ruffle Djoker's feathers a bit if he's to make any impression on this semi final.
DJOKOVIC 5-3 NISHIKORI. That was a cracking game. Nole blows an overhead smash into the net at 30-30 but still manages to rally to make deuce. Kei then pulls up after appearing to tweak his ankle racing into the net. He recovers to put away the winner and then defends brilliantly to outfox the Serb and pose the serve-out question with a crosscourt forehand.
DJOKOVIC 5-2 NISHIKORI. That's too easy. Djokovic cruises through a love hold and is one away from taking a very impressive opening set.
DJOKOVIC 4-2 NISHIKORI. Kei almost wins the game twice over as he sees 40-15 evaporate before staying in touch with a hold from deuce. Djokovic remains firmly in control.
DJOKOVIC 4-1 NISHIKORI. The Japanese No.21 seed has been in plenty of the rallies, but he's coming up short on the points that really matter. Djoker slams a backhand down the line and then sees his opponent fluff a forehand to take it to 15 and stay on course to take the opener.
DJOKOVIC 3-1 NISHIKORI. Kei needed that. He gets on the board to 15 and will hope that kick starts his challenge from here.
DJOKOVIC 3-0 NISHIKORI. Djokovic consolidates as he hits back from 15-30 down to maintain an impressive start to the proceedings.
BREAK! - DJOKOVIC 2-0 NISHIKORI. This is ominous. Novak is straight into the groove, firing his way to triple break point with the help of a precision crosscourt forehand. Nishikori somehow staves off all three and then another one from deuce, but can't survive the fifth.
DJOKOVIC 1-0 NISHIKORI. Nole lands some big first serves as he eases through a simple and effective opener to 15.
Djokovic will serve first.
As the players finish up the warm-up, why not check out Josh Berry's impression of Djoker's inner thoughts after winning his maiden French Open crown.
Read Dan Quarrell's report on Nadal's retirement and Delpo's progress to his first Grand Slam final since winning this tournament in 2009.
Eurosport's very own Tennis Legends John McEnroe, Boris Becker and Mats Wilander sat down to record another stellar podcast at the US Open. Why not give it a listen as we await the start of semi final two.
That's rather precise (23:51 UK time).
Novak Djokovic called on US Open organisers to find a solution to the humidity problems on Arthur Ashe Stadium after sweating his way through to the semi-finals.
The winner of this second semi final will meet Del Potro in Sunday's final. The Argentine was two sets up when Rafa Nadal retired with a right knee injury.
Nishikori: "For sure it [the 2014 win] is going to give me good confidence, even though I didn't remember. Maybe I will try to watch the match again. I don't have a great record against Novak, but always it's been a tough match the last couple of years. I've seen a chance, but I haven't been able to make the last step."
HEAD-TO-HEAD: Djokovic owns the match-up with a 14-2 record. Kei's last victory was back in 2014 when he famously saw off the Serb in four sets at the same stage of this very tournament.
Hello and welcome to LIVE updates of the 2018 US Open men's semi final between two-time champion Novak Djokovic and Kei Nishikori.
The winner will meet Juan Martin del Potro in Sunday's final.