Dwight Howard had 32 points and 16 rebounds and Jameer Nelson finished with 23 as the Orlando Magic stayed alive with a 96-92 overtime win over Boston in game four of their NBA semi-final series.
Nelson nailed back-to-back three-pointers in overtime on Monday for Orlando who avoided a four-game sweep in the Eastern Conference series.
The series now shifts back to Orlando for game five on Wednesday.
But the Magic are constantly being reminded that no NBA team has ever come back from a 3-0 deficit.
"We got into the fight even when they came back and took the lead," said Magic coach Stan Van Gundy.
"The hardest thing is when you go behind in a game like this and you are down 3-0 in the series is to fight against human nature to let it go.
"Our guys didn't do that. We did what we had to do to get a tough win."
Paul Pierce had 32 points and 11 rebounds, and Kevin Garnett finished with 14 points and 12 rebounds for the Celtics.
Ray Allen hit consecutive three-pointers in overtime, but Pierce missed two tries in the final minute as the Celtics failed to sweep the series.