Chennai Super Kings 185-2 (Raina 109no) beat
Kolkata Knight Riders 180-6 by eight wickets
Champions League T20 Final, Bangalore
Both sides took advantage of batting-friendly conditions but it was Chennai's batsmen who came out on top of a high-scoring encounter.
After Gautam Gambhir had struck a fine 80 in 52 balls to guide Kolkata to 180 for six, Raina hit 109 not out in just 62 balls as Chennai clinched their second title with nine balls to spare.
The win was Chennai's fourth Twenty20 trophy but first since 2011 and ended Kolkata's 14-match unbeaten streak.
After Chennai won the toss and chose to bowl first, they allowed Kolkata to get off to a flyer with Gambhir and Robin Uthappa (39 in 32 balls) putting on 91 for the first wicket.
It took an outstanding return of five for 22 from left-arm spinner Pawan Negi to peg Kolkata back somewhat and he took three wickets in the 19th over to remove Manish Pandey (32), Ryan ten Doeschate (0) and Suryakumar Yadav (0) having already seen off Uthappa and Jacques Kallis (1).
Chennai had been far from their best in the field but although Yusuf Pathan struck an unbeaten 20 in nine balls to ensure Kolkata finished with a flourish, Negi's effort meant that the target they were set was a stiff one, but not unassailable.
And although Dwayne Smith fell early, bowled by a Pat Cummins yorker for eight, they used all of their experience of winning big matches to get home.
Brendon McCullum hit 39 in 30 balls but both he and then MS Dhoni (23 not out in 14) played the supporting role as Raina blasted six fours and eight sixes en route to his century.
It was a brilliant innings with shots all around the wicket, from crisp cover drives to trademark powerful shots that sailed over the fence at mid-wicket and Kolkata's inability to remove him meant that their chances were scuppered.
While they clearly missed Sunil Narine, banned from bowling after being reported for a suspected illegal action twice in the tournament, even the West Indian might have struggled against Raina in this sort of form.
It was then left to Dhoni to finish the match with two booming leg-side sixes of his own before he lifted the Champions League trophy for the second time.
© Cricket World 2014