Chasing a stiff 187, Hussey started aggressively smashing consecutive boundaries off Rahul Shukla's second over before stepping out to hit a six off Ajit Chandila. Murali Vijay (3) perished to Chandila couple of balls later, caught and bowled.
CSK however continued to attack with three boundaries off Shukla's fourth. Kevon Cooper was deposited into the crowd by Suresh Raina in the sixth before Hussey carved him away for a boundary.
At the halfway stage CSK were 92 for 1. James Faulkner broke the 90-run second wicket partnership trapping Raina (51) leg before. Needing 47 runs from the last five overs, Hussey (88) hit three boundaries off Cooper before being run out by a direct hit from Rahul Dravid. Faulkner then rattled the stumps of Ravindra Jadeja (0).
MS Dhoni kept CSK in the chase and hit a boundary in the 18th over to bring the equation to 17 off 12. Faulkner struck again having MS Dhoni (21) caught by Binny leaving CSK to get 11 runs off the final over. Bravo (13*) hit a six off Watson and scampered a couple to see CSK home with a ball remaining.
Earlier RR won the toss and chose to bat. Watson started with a boundary off the first delivery. He hit Mohit Sharma for the first six in the third over before pulling Chris Morris over the fence in the fifth as RR plundered 55 runs from their power play overs. Watson continued his attack sweeping Jadeja for a boundary before thumping a massive six to bring up his fifty in just 29 balls. Ravichandran Ashwin got the important breakthrough as he got the ball to spin sharply and crash into Ajinkya Rahane's (16) stumps.
Ashwin struck again dismissing Dishant Yagnik (7) caught and bowled. Dravid (7) was out deceived by a Dwayne Bravo slower ball, giving CSK their third wicket.
However, Watson (102) relentless in his attack launched Jadeja for two huge sixes in the 17th over. He brought up the first century of the season in the next over before being caught by Hussey off Bravo soon after. Binny (36*) continued the assault, and some hefty blows saw RR reach 186 for 4 from 20 overs.
Man-of-the-Match: Michael Hussey
Brief Scores: Rajasthan Royals 186 for 4 (Shane Watson 102, Ravichandran Ashwin 2-20) lost to Chennai Super Kings 186 for 5 in 19.5 overs (Michael Hussey 88, James Faulkner 3-20) by 5 wickets.