Manchester City chiefs are furious with Liverpool boss Jurgen Klopp over comments ahead of Sunday's clash.
City boss Pep Guardiola was targeted with coins on the touchline while the club also allege that their team bus was hit by an object as they left Anfield.
The Times report that City were left totally unimpressed by Klopp's remarks in his pre-match press conference, with belief in Manchester that he inflamed animosity ahead of a fixture that has a history of incidents.
"There are three clubs in world football who can do what they want financially," Klopp said at his press conference on Friday.
Klopp was referring to City, Paris Saint-Germain and Newcastle United, who all hold backing from Gulf states.
City's backroom staff had alleged during last season's encounter that they were spat at by supporters sat behind the dugout. An investigation that followed found no evidence to support this claim, The Times report.
Liverpool have vowed to study CCTV footage and will issue lifetime bans to any fan found to have thrown coins at Guardiola.