“Back-to-backs, it’s not like just the Celtics have got to play them,” Brown said. “Everybody in the whole league (does). It’s no different. So I think we just have the mindset — or try to have the mindset — that we come out and play good basketball and put our best foot forward whoever’s out there as a team. … Back-to-backs are tough to get your body, your mind ready depending on the flights, outside of the injuries. But as you are looking to do something special, those are the moments you’ve got to kind of accept.”