Joe Crawford has revealed that he and the other two referees of Game 6 of the 2013 NBA Finals were fined.

Crawford said referees incorrectly allowed Tim Duncan to enter the game during a video review following Ray Allen's tying basket, a rules violation that led to a fine for the officiating crew. The Heat went on to beat the Spurs in overtime.

"That's the way it should be. You screwed it up, you screwed it up," Crawford said during an interview at the NBA's Replay Center. "We just lucked out."

Mike Callahan told Crawford he wanted to review the play to make sure Allen was behind the arc, though Crawford thought he clearly was.

"I said, 'He's behind the line like this,'" Crawford said, holding his hands a few inches apart. "And he says, 'I want to check.' He says, 'It's too important.' So I said, 'All right.'

"So we go over and what happens, Duncan came in the game and he's not allowed to come in the game. So he came in the game, thank God he didn't score a bucket. That would have been awful."

Duncan replaced Boris Diaw and inbounded the ball on San Antonio's final possession. 

If the Spurs had scored on the play, the Heat could have filed a protest and likely would have won.