The Boston Celtics are set to face the Philadelphia 76ers in the first round of the NBA playoffs, with the Celtics opening as 12.5-point favorites for Game 1 at TD Garden in Boston. According to FanDuel Sportsbook, Boston has a 90.91% implied probability of winning the series, reflecting their strong performance throughout the regular season, where they won 11 more games than Philadelphia. The Celtics boast superior offensive and defensive ratings, while the 76ers may be without their star player, Joel Embiid, who recently underwent an appendectomy. Historically, the Celtics have dominated the 76ers in playoff matchups, winning 15 out of 22 series, including the last six. Given these factors, an upset by the 76ers would be significant, as only seven No. 7 seeds have defeated No. 2 seeds since the NBA playoffs expanded in 1984.