True... but in a team game, your partner should have your back. Emelin made the first mistake but then rather than covering for him, Spacek took himself out of the play, too. You can't always pin a goal on the mistake of a single player.
Spacek took his man. Emelin chased a guy who was already covered. He needs to stay in front of the net there and not chase a guy behind his own net. If he stays out front there is no wide open guy.