Mesut Ozil's father, Mustafa, has threatened legal action after claims in the Spanish press suggested the Germany international was distracted by off-field activities while at Real Madrid.
Earlier this week, ABC, a Spanish newspaper with ties to the Spanish club's president, Florentino Perez, reported that the Blancos chief believed Ozil "wasn't a good professional and was obsessed with women and nightlife".
But the Germany international's father has hit back at those allegations and says the discontent which has greeted the 24-year-old's sale has seen Perez turn the new Arsenal signing into a scapegoat.
"Just because a man earns a lot of money, doesn't mean he's a man of honour," Ozil's father is quoted as saying in Bild. "And Perez is no man of honour.
"Mesut is supposed to be the scapegoat now and I'm the greedy father. A put-up game. We will defend ourselves legally.
"If Mesut had an unprofessional life in Madrid, then why did he always play? They want to blame him now, because the fans and team-mates are angry."
Ozil, who scored or assisted 108 goals in 159 appearances for Madrid, secured a stunning deadline-day move to Arsenal for a fee of €50 million, much to the surprise of many of his former team-mates.