After Chennai rode on Dhoni's onslaught towards the end to post a formidable 196 for three, the bowlers led by Doug Bollinger's three for 22, bundled out Rajasthan for 133 to more or less seal a play-off berth.
With seven wins from 11 matches, Chennai are now second with 14 points.
Apart from Dhoni's 19-ball 41, Michael Hussey (46 of 30) and Suresh Raina (43 off 27), too, impressed with their innovative strokeplay after Vijay laid the platform with a blazing 53 off 40 balls after rival skipper Shane Warne put the visitors in.
During his brief stay at the wicket, Dhoni smashed three sixes and as many fours.
Image: Chennai Super Kings captain Mahendra Singh Dhoni bats during an Indian Premier League (IPL) cricket match between Rajasthan Royals and Chennai Super Kings in Jaipur, India, Monday, May 9, 2011.
Text: PTI
Images: AP/AFP