Hello and welcome to LIVE updates from Day Six of the 2020 ATP Tour finals. First up in the singles it’s a decisive round-robin encounter in Group Tokyo 1970. World number one Novak Djokovic meets Alexander Zverev with the winner set to face Dominic Thiem in Saturday’s semi final.

GAME, SET AND MATCH! – DJOKOVIC 6-3 7-6 ZVEREV. Djokovic comes through a testing second set where Zverev threw everything at him to take the tie break 7-4. The Serb remains in the hunt for a sixth title at this tournament with a straight sets success over the German in one hour and 36 minutes. He will now meet Dominic Thiem in the semi final on Saturday.

TB LATEST: There’s some incredible defence from Djokovic as he hits back from 2-0 down to make 2-2 and ensure he’s level at 3-3 at the change of ends.

DJOKOVIC 6-3 6-6 ZVEREV. VAR drama as Zverev questions a not-up call. The umpire was correct and Djoker gets the decision. The Serb doesn’t have it all his own way but stays focused from 30-30 to force the TB.

DJOKOVIC 6-3 5-6 ZVEREV. When that first serve lands Zverev is a really tough proposition. There’s no danger here as he snares a perfect hold to guarantee himself the minimum of a tie break.

DJOKOVIC 6-3 5-5 ZVEREV. Routine holds have become a rare commodity for Nole in this set. He looks in total control at 40-0 but has to win the game all over again after being pressed to deuce.

DJOKOVIC 6-3 4-5 ZVEREV. Sascha continues to be red-hot in this set. He moves into double figures with aces and dominates in the net duels to apply significant scoreboard pressure.

DJOKOVIC 6-3 4-4 ZVEREV. Bold stuff from the world number one. He goes for the drop shot after being pegged back from 30-0 up, but gets his reward and then clinches parity once more with a crisp forehand into the corner.

DJOKOVIC 6-3 3-4 ZVEREV. Sascha will feel he’s had the edge so far in Set 2 – but it’s still with serve. A terrific deep volley clips the baseline to earn thumbs up from Djokovic as he keep’s the top seed at arm’s length with a hold to 30.

DJOKOVIC 6-3 3-3 ZVEREV. Another half chance for Sascha. The world number seven punches the air in frustration as his probing crosscourt backhand clips the net and flies out at 30-30. He then picks up a drop shot but pushes too long and we’re all square again.

DJOKOVIC 6-3 2-3 ZVEREV. The young German roars with joy as a brutal crosscourt forehand and a volley at the net fend off two break points. A pair of double faults had put him in all sorts of trouble, but he hangs in and screams in delight when another lovely forehand leaves Djoker frustrated with his hands on his hips.

DJOKOVIC 6-3 2-2 ZVEREV. It’s a real mixed bag at both ends of the court at first. Zverev produces the point of the game with a magnificent drop shot from deep and chalks up the first break point of the set when Djoker double faults. The Serb digs himself out of trouble once again and just earns the edge following a succession of entertaining points from deuce.

DJOKOVIC 6-3 1-2 ZVEREV. The Zverev serve is doing a lot of the heavy lifting. He breezes through another hold to nudge the board in his favour once more. Djoker had got himself on the board with a game to 30.

DJOKOVIC 6-3 0-1 ZVEREV. Sascha doesn’t make the same mistake in Set 2. He stays zoned in to kick it off with a hold to 15, despite throwing in a late double fault.

SET! - DJOKOVIC 6-3 ZVEREV. No sign of any jitters under pressure there. The Serbinator paints the lines with a superb 1-2 punch at 30-30 and then clinches the opener in 33 minutes with a clinical backhand winner.

DJOKOVIC 5-3 ZVEREV. Super serving from the German. He’s raced through the gears since being blown away in those first three games. He’s got one last chance to bite back now, but even if he doesn't, at least it bodes well for Set 2 if he can stay on top of his own game.