The issue has been highlighted by Luis Suarez being repeatedly denied clear penalties so far this season, whilst Aguero's countrymen Carlos Tevez and Pablo Zabaleta both had shouts for spot kicks turned down against Fulham this weekend.

When asked if there was a bias, Aguero responded "Yes. Always. But it happens everywhere [in the world]. There is a little bit of privilege with players who come from that country. That is normal. We just play our game, and the referee's job is to know who is tricking him and who is not."