Ravi Shastri recalled the memorable win over the West Indies on the opening day of the 1983 World Cup at the Old Trafford stadium here, an unexpected result that gave them the "belief" of going all the way. Two weeks later, India beat the West Indies again to be crowned world champions for the first time.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/icc-world-cup/1983-world-cup-triumph-ravi-shastri-recalls-the-game-that-gave-them-the-belief/articleshow/69945036.cms