During his 48-ball 62-run knock, Raina struck a six and six boundaries to help his team to a decent total after they struggled to force the pace for a major part of the innings at the JSCA International Stadium Complex here.
Bangalore bowlers were very economical with Varun Aaron being the most impressive with figures of two for 29 from three overs.
Opting to bat, Chennai did not have an ideal start as they lost both their openers within the first five overs, with Aaron accounting for Dwayne Smith (9) and Brendon McCullum (19).
Along with David Hussey, Raina rebuilt the Chennai innings, putting on 75 runs together for the third wicket.
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Raina was more dominating of the two batsmen as he hit all the loose balls that came his way, even as Hussey struggled to get going. Finally it was Muttiah Muralitharan who saw Hussey off for a 29-ball 25.
Even Chennai skipper Mahendra Singh Dhoni failed to take off despite hitting an early boundary off Yuzvendra Chahal.