Ryan ten Doeschate and Andre Russell have now added more than 50 runs for the sixth wicket.

Successive sixes by Russell, off Mohit Sharma, helps the batsman reach a well-deserved half century (off 22 balls). Russell (58 off 25) is finally bowled by Nehra.

However, Ten Doeschate (51 not out) ensures Kolkata a three wicket win, with an over to spare.

From 55-5, KKR have now won their 10th consecutive T20 match.

Russell has started on an impressive note, first hitting a boundary and Pandey and then a massive six off Jadeja, followed by a boundary. 

Another six off the final ball means 17 runs come off Jadeja's second over. 

R Ashwin replaces Pandey (4-0-31-0) in the attack in the 12th over and Ten Doeschate smashes the second ball for a huge six. In his second over, Russell smashes a six, followed by a single, to take Kolkata to the 100-run mark.  

Suryakumar Yadav is the new man in. Kolkata's powerplay total (28-4) is their second lowest ever.

Yadav smashes Ishwar Pandey over square leg for the first six of the Kolkata innings, in the eighth over. 

Ravindra Jadeja replaces Mohit (2-0-13-1) in the attack in the ninth over. An exquisite late cut provides Te Doeschate with his second boundary and takes Kolkata to the 50-run mark. 

Jadeja, however, strikes with his final ball having Yadav (19) caught by Ashwin at short third man. 

Andre Russell is the new man in.

After some confusion it is Mohit Sharma to bowl the fourth over. Confusion, as Dhoni wanted Ishwar Pandey to bowl, but Mohit had started his run up. 

He strikes with his first ball, having Yusuf (1) caught by Du Plessis at first slip. 

Ryan ten Doeschate is the new man in and he starts with a boundary to fine leg. A misfield by Pandey hands the batsman his second boundary three balls later. 

Nehra strikes for the third time in his third over, having Bisla (2) caught by Ashwin at mid-on. 

Gautam Gambhir and Manvinder Bisla open the batting for Kolkata and it will be Ashish Nehra first up for Chennai. He gives away just a single. 

Ishwar Pandey to bowl the second over. He gives away six runs, with Gambhir finding the fence. 

Nehra strikes twice in his second over, having Gambhir (6) caught by Bravo at mid-on in the first ball and in the next ball, having Manish Pandey caught by Mohit Sharma at mid-on. 

Yusuf Pathan is the new man in. 

Pat Cummins is back into the attack in the 17th over. His third over is an expensive one, 21 runs coming off it with Bravo clearing the fence twice. 

Narine ends with impressive figures (4-0-9-1), bowling as many as 16 dot balls. 

However, Dhoni (38) and Bravo (28) add 71 in an unbeaten fifth wicket stand to take Chennai to a formidable 157 for four.

Chawla has ended his spell with figures of two for 26. Yadav returns to the attack in the 14th over. Bravo smashes the third ball over extra cover for his first boundary. 

The fifth ball is hit to the fine leg by the batsman. Yadav has been the most expensive bowler for Kolkata tonight.

Andre Russell replaces Chawla in the 15th over and Dhoni swats the second ball to the fine leg fence to help his side get past the 100-run mark. The fifth ball is smashed backward of square for another boundary as 12 runs come off the over.

Chawla returns in the 13th over. He strikes with his third ball, a smart bit of stumping from Manvinder Bisla cutting short Du Plessis' (14) stay at the crease. 

It's Chawla's second wicket of the innings.

Dwayne Bravo joins his canteen at the crease.

Raina and Du Plessis are putting together a good little partnership here. They add 35 runs for the third wicket.

Sunil Narine is back to bowl in the 12th over. He has Raina (on 28) out leg before in the fourth ball.

MS Dhoni, the Chennai captain, comes out to bat.

It's twin spin with Sunil Narine replacing Cummins (2-0-17-0) in the attack in the fifth over. He gives away just three runs first up.

Chennai manage 47 runs for the loss of a wicket in the powerplay. 

Yusuf Pathan to bowl the seventh over. He strikes with his fourth ball, having McCullum (22) out leg before. 

Faf Du Plessis is the new man in, and he hits a boundary off the second ball he faces, a shot that helps Chennai get past the 50-run mark. 

Yadav replaces Chawla (2-0-17-1) in the eighth over and Raina welcomes him with successive boundaries.

Piyush Chawla replaces Yadav in the attack in the fourth over and Smith welcomes him with two big boundaries. 

However, the bowler has the last laugh, having Smith (20) caught behind off the last ball.

Suresh Raina is the new man in.

Brendon McCullum and Dwayne Smith open the batting for India and it will be Pat Cummins first up for Kolkata. 

It's an eventful first over, with Smith (on nought) dropped off the fourth ball by Yusuf Pathan at first slip. McCullum smashes the final ball through cover for a boundary. 

Umesh Yadav to bowl the second over. It's an expensive one, 10 runs coming off it with both the batsmen finding the fence.

Kolkata Knight Riders take on Chennai Super Kings in Hyderabad, a clash of two teams that have won the IPL twice each. 

Kolkata has won the toss and invited Chennai to bat first. 

MS Dhoni, the Chennai captain, doesn't think the pitch is going to change much.