The phrase "penalty decision" refers to a judgment made by a referee or official in a game or sport where a player is penalized or punished for breaking the rules. Full definition
Players don't even play good for most of the match, then go and complain about penalty decision in the end. (justarsenal.com)
Another coincidence maybe, but the Gunners got a soft penalty decision when a former player is in the TV studio to run the rule over the game. (justarsenal.com)
Not by too much, and probably by the odd goal in three and due to a unjust penalty decision, but they are just better than us this year. (evertoniansclub.com)