Boston captured the winner-take-all matchup to claim the best-of-seven Eastern Conference finals MIAMI: The Boston Celtics, led by 26 points from Jayson Tatum, advanced to the NBA Finals by defeating Miami 100-96 on Sunday, setting up a showdown against the Golden State Warriors. Boston captured the winner-take-all matchup to claim the best-of-seven Eastern Conference finals 4-3 and secure a place in the championship series, which begins Thursday in San Francisco.