Stoke City boss Tony Pulis has held talks with referees' chief Mike Riley.
Pulis feels too many referees are going into games involving the Potters with preconceived ideas about their style of play.
He told the Stoke Sentinel: "I have spoken to Mike Riley this week. I find the whole situation disappointing week after week.
"Look at the incidents where our players are being booked or sent off, then compare them with similar incidents involving others that are going unpunished. There was the Clark one on Glenn at Villa."
Pulis added "All we have ever asked is to be treated the same as everyone else, but there are preconceptions about us that are unfair."