Miami Heat's Tyler Herro (groin strain) out for Game 6 vs. Boston Celtics 7:26 PM ET ESPN News Services BOSTON -- Heat guard Tyler Herro remained sidelined because of a strained left groin as Miami tries to stave off elimination in Game 6 of the Eastern Conference finals Friday night. The reigning sixth man of the year hasn't played since Game 3 of the Heat's matchup with the Boston Celtics . Miami coach Erik Spoelstra said Herro has made progress and wants to play, but that this was deemed to be the most responsible decision. "He's not quite ready, to step into this kind of intensity of a game,'' Spoelstra said. The Celtics are looking to close out the Heat and advance to the NBA Finals, where the Golden State Warriors await. The Associated Press contributed to this report.