MI is very consistent team, they didn't want to break their opening game losing streak against the senior citizens so they let them win. 10/10 to MI for fair play award.

Can someone breakdown the margin point calculation? Whoever have chosen CSK to have a comfortable win have gotten 1 point while a comfortable for battting 2nd is; 3-5 wickets win or 5-9 balls remaining. CSK won with 5 wickets but it was a narrow win. Why? Is lower one considered here? In fact, CSK win can be considered as both; narrow & comfortable. But how do they calculate exactly?
4 balls remained in the end hence "Narrow win"
I dont think that this match was a "Narrow Win" as you can see that after loosing 2 quick wickets CSK players started to play safely and according to it they won it easily.