And Federici is becoming increasingly incensed by the tactic.
"It's getting quite frustrating," he told the club's official website. "After the first couple of games I played, teams picked up on it and I now have a lot of people standing behind me or in front.
"At the weekend I got a kick in the ankle when my leg was in the air and that is quite dangerous because it's not protected. Injuries could really happen so I just hope referees will go and put a stop to it.
"On Saturday I was looking to put Leroy in one-on-one with a defender so it would have been a good opportunity for us."