Rohit Sharma hit an unbeaten 105 but his Mumbai Indians fell 20 runs short as they tried to chase down a big target set by holders Chennai Super Kings in a battle of IPL heavyweights on Sunday. Set 207 for victory, five-time winners Mumbai finished on 186-6 even though Rohit raised his ton in 61 balls at his home in Wankhede Stadium. Skipper Ruturaj Gaikwad and the in-form Shivam Dube powered Chennai, who won their fifth title last year, to 206-4.