Raina batted magnificently to strike exactly 100 off only 53 balls with the help of seven fours and half a dozen sixes.
The UP left-hander became the third batsman after Chris Gayle and Shane Watson to score a century in the current edition.
Batting on 91 at the start of final over, Raina reached 97 with a brilliant straight six off Parvinder Awana, and then scampered home for a double. Off the penultimate delivery of the final over, he took a single to reach the milestone as the heads totting the stands at the Chepauk gave him a standing ovation.
Wriddhiman Saha struck a four and a six during his innings of 18 before he was caught by Shaun Marsh at deep square leg off Awana's bowling.
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Hussey and Raina hardly took any risks and yet added 55 runs in only 7.2 overs. While Hussey was content rotating the strike, Raina repeatedly peppered the off-side field with his trademark shots in between the cover and extra-cover arc.
When leggie Piyush Chawla came into bowl, Raina punished him with a huge six over deep mid-wicket.
If Raina played the cover dives with consummate ease, Hussey was equally good with the pull shots.