People assume incorrectly that it is Joey Crawford who has it in for any team that is playing for the Heat. That is incorrect, Joey is a bad ref equally to both teams.
It is Danny Crawford that the Spurs should be worried about. Since 2004 the Heat are 19-4 in games he has officiated in the playoffs.
Also, Scott Foster has been named as a ref for Game 7 and the Heat are 14-1 in the last 15 games he has been an official in their playoff games.
Add on to that a road team hasn’t won a Game 7 on the road since 1978, it is going to be an uphill battle for the Spurs.