Zverev: "Right now I can't describe it. I'm unbelievably happy. It's the biggest title I've ever won..."
Novak Djokovic - Alexander Zverev
ATP World Tour Finals - 18 November 2018
World Tour Finals – Follow the Tennis match between Novak Djokovic and Alexander Zverev live with Eurosport. The match starts at 18:00 on 18 November 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 Novak Djokovic vs Alexander Zverev. Get all the latest on Tennis: fixtures, results and tables.
Djokovic: "...If we put things in perspective it was an amazing year, a great comeback... and thank you guys (Nole's team) for helping me to get where I am..."
That was a stunning performance from Zverev as he deservedly defeated the world number one and five-time winner of this tournament in one hour and 20 minutes of absorbing tennis.
GAME, SET AND MATCH! - DJOKOVIC 4-6 3-6 ZVEREV. Alexander Zverev pulls off a major shock to down the world number one in straight sets and secure the biggest title of his career in what many will suggest is a breakthrough performance.
The German broke Nole on his second match point with a stunning pass down the line to become the youngest champion at the Nitto ATP Finals since Djokovic himself in 2008 (in Shanghai).
LATEST: Djokovic coughs up a double fault and then fires way long for 15-40....
TWO championship points to Zverev...
A big serve from Nole and he staves off one...
DJOKOVIC 4-6 3-5 ZVEREV. The biggest title of Zverev's young career is tantalisingly close. He powers to an emphatic hold to 15, lashing a crosscourt forehand winner to seal it.
Djokovic must now hold to stay in the tournament...
DJOKOVIC 4-6 3-4 ZVEREV. Nole stays hot on the heels of the young pretender with a solid enough game to 30. The Serb mixes it up with a smart serve and volley combo to conclude.
DJOKOVIC 4-6 2-4 ZVEREV. That's a HUGE hold.
Sascha gets off to a torrid start and he screams in frustration as his first serve goes AWOL. He's forced to do it the hard way, finding a stunning volley at 0-30 and then outlasting Djoker in another pulsating rally. The German finds a timely ace before puffing out his cheeks in relief when Nole corks an attempt down the line into the net.
One down, two holds to go for the 21-year-old.
DJOKOVIC 4-6 2-3 ZVEREV. That's more like it from Djokovic. He resets and finds that service rhythm in the nick of time. A much-needed love hold ensues and turns the screw on Zverev once more. Will the German tighten up with the match now on his racket if he keeps his serve for the remainder of the contest?
DJOKOVIC 4-6 1-3 ZVEREV. Sascha starts with a big serve but then finds the nerves kicking in as Djoker presses for 15-30. The Serb can't up the ante though, as he balloons way long of the baseline in quick succession. Zverev stays patient on the final point and drills attempted passes at Djokovic that the world number one can't keep returning. The German wobbled slightly, but this time he consolidates!
BREAK! - DJOKOVIC 4-6 1-2 ZVEREV. This is sensational! After looking untouchable on serve all week, Djoker has lost his last three in a row.
He squats to his knees after coming out second best in another lung-bursting rally before dumping an attempt at a drop shot into the net. It leaves him facing two more break points and he succumbs on the first with another tired-looking forehand into the net.
How right you were, Greg!
BREAK! - DJOKOVIC 4-6 1-1 ZVEREV. That's a shocker from the German and the first major dip in his level.
He throws in an awful service game, firing down two double faults and missing the lines with two backhand attempts at the winner.
Nole breathers a massive sigh of relief and breaks right back without actually doing much.
BREAK! - DJOKOVIC 4-6 0-1 ZVEREV. Sascha is on fire!
Novak hits a tired-looking forehand into the net for 15-30 and then gets bested in another high calibre 26-shot rally to cough up a fourth break point in a week...
This time he finds a big first serve to get him out of jail, but he can't quite wriggle free from deuce. Zverev battles for a second opportunity and this time he goes for it, blazing a sizzling forehand winner to conclude another epic rally.
What a match this is proving to be!
SET! - DJOKOVIC 4-6 ZVEREV. That's an incredible first set of tennis from Alexander Zverev! He serves it out to 15 with aces five, six and seven doing plenty of damage! We are 39 minutes in and a potential shock is brewing. It ends Nole's hopes of becoming the first player to win the title at the season finale without dropping a set since Ivan Lendl in 1986 - but beware the wounded beast. The world number one will still believe he can win this and that Zverev's level will surely drop.
BREAK! - DJOKOVIC 4-5 ZVEREV. Wow! Just, wow! Zverev piles on the pressure and makes the breakthrough!
Djokovic replies from 15-30 with some sublime hitting as he licks the lines off both flanks to reach parity. However, he blows a forehand long in the next exchange to cough up only the third break point he has faced this week.
On this occasion, he can't stave it off and slams a tight approach into the net. Zverev will now serve for the set!
DJOKOVIC 4-4 ZVEREV. Sascha delivers more powerhouse serving as he continues to keep pace with the top seed. He conjures up a fourth ace along the way to a love hold.
DJOKOVIC 4-3 ZVEREV. Novak is working harder than he has all week in the points on his serve, a fact exemplified by anther brilliant 19-shot rally to open the game. However, the result is pretty much remaining the same. He continues to come out on top without feeling any score pressure.
DJOKOVIC 3-3 ZVEREV. Sascha continues to impress. He hammers down aces three and four as well as outlasting the world number one with some robust hitting from the baseline in a top-class 20-shot rally.
The O2 crowd have been treated to some world class stuff so far. Let's hope it continues from both players.
DJOKOVIC 3-2 ZVEREV. Nole will be delighted to have come out of that without having to answer a few more questions under pressure.
The Serb dumps a horrible volley into the net to trail 15-30 and is then left relieved when Zverev's angled pick-up to meet his attempted pass doesn't quite make it over the net.
The German swishes his racket in frustration and then slaps a make-able backhand approach into the net to let his opponent off the hook.
DJOKOVIC 2-2 ZVEREV. It looks like Zverev has got his serving Mojo flowing just like he did against Federer. He lashes down some missiles and also shows the deftest of touches with a delightful angled volley on his way to a convincing hold.
DJOKOVIC 2-1 ZVEREV. Considering this has been a fine start from Zverev, when you actually look at the impact he's having on return, it's very little. Nole roars through a quick-fire love hold and on this evidence remains in with a shout of being the first man to lift the ATP Finals trophy without being broken since ATP match facts began in 1991.
DJOKOVIC 1-1 ZVEREV. Sascha looks in the zone right from the off here. Djokovic can't really get a foot-hold in the game as the German races through a simple hold with some hue serving, concluding it with a sizzling ace down the middle T.
It's looking promising for a cracking battle here, but can Zverev maintain this level throughout?
DJOKOVIC 1-0 ZVEREV. Sascha's Ivan Lendl inspired tactics on the coin toss almost pay dividends as Novak takes a moment or two to get going.
The German snares the first point and then engages the Serb in a magnificent 29-shot rally that the world number one edges. From there, Nole raises his level and moves through to hold with relative ease, but there was enough there to give the youngster some extra belief.
Zverev won the toss and has opted to receive, so it's Novak Djokovic at the service line ready to get this final underway.
Zverev: "Novak right now is the best player in the world. It's very tough to beat him. He's barely lost a match in the last six months. He's playing amazing tennis. You have to play your best game to even have a chance."
Djoker on Zverev: "He's shown some great skill on the court the last couple years. He's shown why he deserves to be in the mix of the top players in the world."
HEAD-TO-HEAD: This their fourth meeting. Djokovic leads 2-1 overall after a 6-4 6-1 success over the German in the round robin earlier this week.
Novak also won in Shanghai this year after Zverev won their first ever meeting to lift the 2017 Rome Masters title.
Meanwhile, the 2018 doubles title has gone to Nico Mahut and Pierre Hugues Herbert.
Good to see Zverev getting full backing. He was just following what's written in the rules after all...
How will the crowd respond to Zverev today after he was harshly booed following a controversial moment in the second-set tie break of his win over Federer?
Meanwhile, Zverev overcame veteran superstar Roger Federer on Saturday afternoon to deny the Swiss a chance at a 100th career title.
Can the 21-year-old German upstage another legend of the game to pull off a shock and claim the biggest triumph of his career to-date?
World number one, Djokovic has been irresistible this week. Last night he thumped Kevin Anderson and looks red-hot favourite to lift the trophy come the end of the evening.
Hello and welcome to the final of the 2018 Nitto ATP finals. It's five-time champion Novak Djokovic against young pretender, Alexander Zverev.
Can Djoker equal Roger Federer's haul of six titles in this tournament? Or will there be a new name on the trophy?
The players are due on court from 18:00 GMT.