Bayern Munich and Germany international forward Thomas Muller believes that Real Madrid have made a mistake in letting Mesut Ozil go.
The German playmaker joined Arsenal on a long-term contract from Madrid on transfer deadline day for a reported fee of £42.5m.
"I knew that Mesut was feeling very comfortable at Madrid," Muller told Bild. "But in football, things can happen quickly.
"Real threw everything overboard [this summer] - new coach (Carlo Ancelotti), new stars (Isco, Gareth Bale). I wouldn't have sold Mesut.
"However, I have the feeling that he is looking forward to a new chapter in his career at Arsenal."
Ozil played for Madrid for three years, winning La Liga and the Copa del Rey once each.
