I didn't see the game, but the +/- indicates that Philly was much worse with him on the floor in game 1 - much like how Philly was significantly worse throughout the entire series against the Celtics in last year's playoffs while he was on the court.  This was predictable.  I continue to see Simmons as highly overrated and mentally weak.
I had to scoff when he made the remark about having "many rings" around his fingers in the future.  You can't build a team around Simmons.