Manchester City chairman Khaldoon Al Mubarak believes that some of their rivals are jealous of the English champions' success.
The Citizens made history by becoming the first English club to win a domestic treble when won the FA Cup recently having already clinched the EFL League Cup and Premier League title.
City, who are known to be big spenders in world football, have been referred to Uefa's financial body amid allegations of financial fair play (FFP) rule breaches.
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The club has strenuously denied this and Mubarak said he will not accept "being used as a diversionary tactic on poor investment decisions".
"With success, there is a certain level of jealousy, envy, whatever you call it. That's part of the game," said Mubarak on BBC.
"It's not easy for our competition, we know that. But the reality is, we didn't buy the most expensive player in the Premier League [Pogba], we didn't buy the most expensive goalkeeper [Kepa Arrizabalaga], we didn't buy the most expensive midfielder, we didn't buy the most expensive striker [Lukaku].
"People make decisions, they've got to live by them. This is a well-run club."