The attacking midfielder has hinted that he might have stayed at Madrid if the former PSG coach had given him the feeling that he was still an important player
The Germany international opted to say farewell to the Santiago Bernabeu side after the signings of Isco and Gareth Bale, joining Arsene Wenger's side for a club-record fee on deadline day.
However, Ozil has suggested that he might have stayed put had Ancelotti given him the feeling that he was still an important first-team member.
"It is very important for me that the coach shows faith in me and believes in me," Ozil told TF1.
"I had no doubt that I would stay at Real Madrid when last season came to an end. But then something happened and I no longer had the coach's trust.
"At Arsenal on the other hand, I feel the exact opposite."
Ozil, 25, has made seven Premier League appearances for Arsenal so far, scoring twice in the process.