From the moment Real Madrid fans began chanting Ozil's name at Gareth Bale's unveiling on deadline day, the Spaniards should have seen the backlash coming.
But they went ahead and sold him to Arsenal anyway, and the mood around the club hasn't been the same since.
Star player Cristiano Ronaldo admitted he was 'angry' at his sale, while Sergio Ramos said he was 'saddened' by Ozil's sale.
Madrid head into El Clasico this weekend knowing the result will be pivotal in their season, they could go level on points with Barcelona with a win - or end up six points behind them.
Ozil at Arsenal meanwhile is in the form of his life, making Madrid's decision to let him go looking more cavalier by the day.
He has commented on the Madrid backlash to his sale for the first time, telling Bild:
"I was at Real well regarded by the team and the fans.
"I consider it a great respect for me as a person, that players and fans have complained about the transfer.
"I had a very good track record at Real Madrid in all three years... I'm real grateful for the time I had there."
You can quite feel sorry for Madrid's players and supporters. Consider from an Arsenal perspective the outpouring of anger if Mesut Ozil was sold. In fact it doesn't bear thinking about...
image: © jansolo09