The Heat finally know who stands between them and a trip to the NBA Finals. With a 109-81 decimation of the defending champion Milwaukee Bucks in Game 7 of the Eastern Conference semifinals on Sunday, the Boston Celtics advanced to the Eastern Conference finals. Boston will face Miami in Game 1 on Tuesday at FTX Arena in Miami at 8:30 p.m. Whether the Celtics or the Bucks had won, Heat coach Erik Spoelstra said it wouldn’t make much difference to the top seed in the East. “At this point, whoever it is, both sides are familiar with each other just from regular season and how much we’ve played against each team in the playoffs,” Spoelstra said. The Heat and Celtics are no strangers to each other.