Liverpool manager Brendan Rodgers fears striker Luis Suarez will struggle to shake off his reputation for diving.
Suarez put in a dazzling performance at Norwich on Saturday, scoring a hat-trick in the fixture for the second season in a row and setting up another in the 5-2 win at Carrow Road.
But Suarez was again denied a penalty when Leon Barnett clearly barged the striker over and brought his elbow down on the Uruguayan's shoulder in the box, only for referee Mike Jones to wave the appeals away.
The previous week, Suarez had been tripped by Manchester United defender Jonny Evans without being given a spot-kick, while he received a yellow card for simulation during the recent draw at Sunderland.
"There is that fear," Rodgers said. "I could tell you about three or four strikers who go down in the box with very minimal contact, and all of them have had penalties this year.
"Everyone in the ground saw it was a penalty. Apart from the referee.
"I can't worry too much about it. It's something that hopefully the referees, when they analyse and assess their own performance, will have a look at.
"We just have to concentrate on building our game, developing our football, and hopefully these penalties that we don't get won't come back to haunt us."