Three short years ago, Jayson Tatum’s Boston Celtics met Tyrese Maxey’s Philadelphia 76ers in the Eastern Conference Semifinals. Starting Sunday, April 19, the longtime rivals (who have played each other more in the playoffs than any two clubs in NBA history) will run it back. Like last time, Boston has home-court advantage after finishing the 2025-26 season second in the Eastern Conference. Their home games at TD Garden are set to take place: Game One Sunday, April 19 1 p.m. Game Two Tuesday,