CSK should have opened with Shane Watson and Faf du Plessis, the two power hitters.
Murali Vijay haven't played a single match in IPL 2019 (if i am not wrong) and as expected he didn't performed well in previous 2 matches.
If watson and faf have opened for CSK then they could have easily scored 80-90 runs in first 10 overs and one of them may have lead CSK to a win