Skipper Virat Kohli's century was crucial in India's massive 102-run over the West Indies here on Friday night.
Kohli said the knock was important as it helped India post a mammoth total of 311/7, that led to them earning a bonus point.
"More than the century, I am happy we won with a bonus point," Kohli, who was adjudged Man-of-the-Match, said after India's resounding win.
"It was my second game as captain and I got a century. I was getting good starts, but failing to convert, so I was waiting for this big innings," he said.
"We got a good start. It's a bit of a tricky situation if you go in to bat after a good start. You don't know whether to play yourself in or keep going at the same run rate. To get a hundred in my second game as captain, I am pretty happy," he said.
West Indies were favourites to enter the final after two consecutive victories but India's result has opened the tournament.
India opener Shikhar Dhawan, who scored 69 runs and shared a 123-run first-wicket stand with Rohit Sharma (46) said batting was not easy on the wicket.
"We really needed the opening partnership. The pitch was doing a lot. We respected good balls and punished the bad ones. In the end we got a good total. It was a challenging wicket and when you score on such tracks, it is satisfying," the left-hander said.
West Indies skipper Dwayne Barvo hoped that the hosts would put up a better show when they clash with Sri Lanka in their next match on Sunday.
"We have got to give credit to the Indian batsmen, especially Virat Kohli. Chasing 300 is never easy but we could have done a lot better with our chase. We have got to regroup for the match against Sri Lanka. We can't afford to make the same mistakes again.
"We accept our defeat today, but we are still in a good position, and I believe that come Sunday we have to give a better account of ourselves," he said.