Liverpool are questioning Manchester City's mind-blowing £400 million sponsorship deal with Etihad Airways.
Reds MD Ian Ayre, has joined Arsenal in attacking Manchester City's £400m sponsorship deal with Etihad Airways.
Ayre said: "Are Etihad, City and owner Sheikh Mansour a related party? If they are, then it's up to UEFA to rule on it."
Arsenal boss Arsene Wenger has also called for UEFA to investigate.