Bravo gets the vital wicket of Gambhir (63) in the first ball of his final over. 

The Kolkata captain's 52-ball innings was inclusive of six boundaries and a six and he has probably done enough to see his team through. 

Debabrata Das gets seven runs off the first three balls he faces to take Kolkata closer. The visitors need just six off the last over, to be bowled by Ashwin. 

The spinner has Yusuf Pathan (12) caught by Faf du Plessis off the third ball. 

However, Das (11 not out) seals a memorable win for Kolkata with a boundary off the fourth ball. 

Kolkata win by five wickets, ensuring Chennai their third home defeat of the season.

A single off Bravo helps Gambhir reach a well-deserved half century. 

It is his fourth fifty in this edition and his 14th overall in the IPL. He celebrates the feat with successive boundaries, the latter helping Kolkata surpass the 100-run mark.

He now has the responsibility to take his team home.

Kolkata 112 for two after 16 overs.

Gambhir and Kallis have put together 70 runs (in 58 balls) for the second wicket now. 

However, Bravo strikes in his second over, having Kallis (26) caught behind. 

Relief for Chennai. Can they turn things?

Kolkata 86 for two after 13 overs. 

Kallis smashes Ashwin for a six over deep square leg in the latter's second over. 

Gambhir also helps himself to a maximum in Jakati's second over, his shot sailing over long-on. 

The experienced duo are slowly and surely taking the game away from the holders. Yo Mahesh goes for 11 in his first over, with Gambhir getting a boundary past point.

Kolkata 64 for one after nine overs. Time for the first strategic timeout. 

Shadab Jakati to open the bowling for Chennai and it will be Gautam Gambhir and Brendon McCullum to start the chase for Kolkata. 

Gambhir hits the first ball through cover for a boundary but only seven runs come off the over otherwise. Albie Morkel to share the new ball and he also gives away seven runs. 

R Ashwin to bowl the third over and he strikes fifth ball, having McCullum (2) caught by Jakati at mid-off. 

Jacques Kallis comes out to bat.

Kolkata 15 for one after three overs.

Albie Morkel comes out to bat with two ovesr remaining. 

Lee goes for 11 in his final over, with Dhoni hitting a boundary. Narine to bowl the final over. 

He concedes just 10 runs. A great bowling performance by the Knight Riders. 

Chennai restricted to 139 for five in their stipulated 20 overs. 

MS Dhoni remains unbeaten on 34 and Albie Morkel on 13. 

Kallis ends his spell with impressive figures of two for 21. Ravindra Jadeja comes out to replace Raina. 

Abdulla to bowl immediately after the second strategic timeout. The home team reach the 100-run mark in the 16th over, Dhoni getting his first boundary past point. 

Narine accounts for Jadeja (9), caught by Das, in his third over.

Chennai 118 for five after 18 overs. 

Laxmi Ratna Shukla replaces Rajat Bhatia (2-0-17-0) in the attack in the 12th over and concedes seven runs first up.

Kallis strikes in his final over, having Raina (44) caught by Pathan. 

Raina's 34-ball knock was inclusive of four boundaries and a six but he threw his wicket away at a time when Chennai could ill afford to.

Chennai 88 for four after 13 over.

Kallis strikes in the first ball of his third over, having Bravo (12) caught by Abdulla at long-on. 

MS Dhoni comes out to join Raina. 

Chennai 77 for three after 11 overs.

Dwayne Bravo comes out to bat even as Chennai have lost both their openers early. 

Abdulla replaces Lee (2-0-12-1) in the attack in the sixth over. Raina hits the third ball through backward square leg for a four while Bravo smashes the final ball over the deep midwicket fence for a maximum. 

Jacques Kallis bowls the seventh over and Raina welcome shim with a boundary first ball through covers. Chennai reach the 50-run mark in the over.

Chennai 60 for two after eight overs. Time for the first strategic timeout.

Yusuf Pathan to bowl the third over. Hussey welcomes him with a boundary first ball to the square leg even as 10 runs come from the over. 

Lee goes for 11 in his second over with Raina smashing the fifth ball for a massive six over long-off. 

Sunil Narine comes in to bowl in the fifth over. Hussey (18) hits the fifth ball for a four through covers but is run out the next ball.

Chennai 32 for two after five overs. 

Iqbal Abdulla opens the bowling for Kolkata while it is Mike Hussey and Faf du Plessis opening the batting for Chennai. Four runs come off the first over. 

Brett Lee to share the new ball. He strikes fourth ball, having Du Plessis (3) caught behind.

Chennai five for one after two overs. 

Chennai Super Kings won the toss and elected to bat first in their Indian Premier League match against Kolkata Knight Riders at the M Chidambaram stadium on Monday. 

"It looks like a good wicket and we would look to take some pressure off by putting some runs on the board," reasoned captain MS Dhoni.

Chennai has made two changes to the starting line up. Mike Hussey comes in for Nuwan Kulasekara and Wridhimann Saha makes way for Yo Mahesh. 

"It is not going to change too much. We are happy with whatever we do," said Gautam Gambhir, the Kolkata captain.

The visitors are fielding the same side that beat Bangalore on Saturday.