ATP World Tour Finals: Kei Nishikori bt Tomas Berdych

Nishikori wins 7-5, 3-6, 6-3.

It's over! Nishikori takes the third set and with it, the match!

MATCH POINT! Nishikori has not conceded a single point in this game so far.

Serving for the match! Nishikori will look to capitalise and seal this!

He can't! Nishikori leads 4-3 in the third set.

88mph winner from Berdych, and it's break point for the Czech, who will look to take the lead in the third set.

Game point as Berdych looks for the equaliser and takes it!

2nd break point.

Break point! Nishikori is about to take a 2 game lead.

5-3 to Berdych, who serves for the set.

Nishikori serves to stay in the match. Game point for him .. and he takes it to stay in the set.

Berdych looks all set to take the second set, with a 5-2 lead over his opponent.

With 9 winners so far in the second set, Berdych is steamrolling Nishikori after a difficult first set.

3 break points.. and it's finally game Berdych! He leads 4-2.

Yes he can. The break is offered on a silver platter by Nishikori by way of a double fault. Berdych 5-7 *2-2 Nishikori
— ByTheMin Tennis (@ByTheMinTennis) November 17, 2015

10 backhand unforced errors from Berdych so far; 5 from Nishikori.

And he holds! Nishikori is now up 2-0 in the second set.

Nishikori inaugurates the second set by breaking Berdych for the first game.

Kei Nishikori closes out the first set after a tough battle! He now leads 7-5.

And service is broken for the first time in the match! Nishikori now leads Berdych 6-5.

It's break point for Nishikori.. but he's unable to capitalise. Deuce.

Berdych challenges..but it's OUT! Berdych leads 5-4 and it's game point for Nishikori.

And so it continues... each taking their service games in succession.

2 return backhand winners from Berdych so far, and the Czech has a 3-2 lead over Nishikori. Game point for the Japanese ace.

Berdych/Nishikori loser is gonna be out most likely. Big match.
— Tripp André (@arandomgamer02) November 17, 2015

【Berdych 0-0 Nishikori】 ①2-2 B：15-15　30-15　40-15　40-30　40-40　GP　DC　BP　DC　BP　DC　GP pic.twitter.com/ivoZBcG6vw
— aryamar (@dankai_kemari) November 17, 2015

2nd break point for Nishikori.

A ripper from Kei Nishikori flummoxes Berdych and takes the game to break point!

It's a game of back and forth with Nishikori and Berdych each taking their service games in succession. They're level at 2-2 in the first set.

Nishikori and Berdych have each won their first service games; Berdych now serves for his second service game.

Nishikori with a beautiful shot takes the 2nd game with the players now level at 1-1.

Game Berdych! 1-0 in the first set.

Nishikori turns it around with the pair now at deuce in the first game.

And it's already game point for Berdych, who's up 40-15 in the first game.

And they're off. Berdych serves to start and takes the point straightaway.

The oldest is 34-year-old Roger Federer, who will play World No. 1 Novak Djokovic later tonight.

At 25 years of age, Kei Nishikori is the youngest player at the ATP World Tour Finals.

Federer, Djokovic, Nishikori and Berdych are all in the Stan Smith group at the ATP World Tour Finals, with their round robin games underway.

While Berdych lost to Roger Federer in straight sets 6-4, 6-2, Nishikori was routed by World No. 1 Novak Djokovic 6-1, 6-1.

Nishikori and Berdych both come into today's match on the back of losses.