Chelsea boss Jose Mourinho says it would be a "disaster" to punish divers retrospectively.
Diego Costa and Willian both received yellow cards for dives against Hull at Stamford Bridge last week, when City boss Steve Bruce claimed Gary Cahill went down "like something out of Swan Lake" in the area.
Those incidents have added to the calls for an independent panel to review and punish players who dive, with former referee Mark Halsey suggesting it is the "only one real solution".
But Mourinho said. "The independent panels don't do their job well in any case.
"When you go to an independent panel to analyse and suspend players by video evidence, it is a disaster. It is a disaster.
"I remember last season, and I don't want to say the names of clubs or players, you had players and clubs punished by panels and you had clubs and players protected by panels.
"I saw somebody kick a player on the floor, hit him in the back - no suspension. I saw others with minor things being suspended.
"Players are punished for silly comments on Facebook, Instagram and this kind of thing, and players are not punished for other things.
"You speak one week about one dive that, for me, was not even a dive - you don't speak about Filipe Luis who could be in this moment in the hospital having big surgery on his knee or in his leg.
"Independent panels are the same ones that last season analysed my situation against Aston Villa and I was punished and suspended because I tried to help, so for me panels only favour the ones who always have the favours."