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".
|33/1||Mesut Ozil is 33/1 with Coral to get sent off on his Arsenal debut
"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 £40 million, much to the surprise of many of his former team-mates.
Goal will be covering the German's first Arsenal press conference LIVE from 11am BST, and you can send in your thoughts and questions for the former Werder Bremen playmaker via Twitter and Facebook, with the hashtag '#AskOzil'