Kings XI batsmen committed harakiri as they lost five wickets for just 27 runs at the end. From 127 for three in 15.5 overs, visitors' batting collapsed.
Opting to bat, Mandeep scored a composed 50-ball 56, laced with five fours and a six, while Marsh played a fine 22-ball 32 knock, hitting four fours and a six.
Promoting Marsh to the opening slot paid rich dividends as he along with Mandeep shared a valuable 68-run partnership for the first wicket in 8.1 overs.
Both the openers hammered boundaries all over the park, adding 43 runs in the first six overs of mandatory powerplay.
The pair looked comfortable against the pace duo of Nuwan Kulasekara and Albie Morkel and that prompted Chennai skipper Mahendra Singh Dhoni to introduce off-spinner R Ashwin in just third over of the innings. And Ashwin in turn gave away just five runs.
But Mandeep, who scored his maiden fifty today, had other ideas as he hit the offie for a six and a four in his very next over.
Dhoni brought in left-arm spinner Shadab Jakati into the attack, who found a place in the team ahead of medium-pacer Yo Mahesh. Part-timer Suresh Raina was too introduced into the attack as Dhoni searched for the first breakthrough. PTI RE SHN CM