1.feeling or showing confidence in oneself; self-assured.
What i took Wengers comment to mean was that just like the definition of confidence Wenger is assured in his relationship with Özil. One of the big reasons Özil came here is because of Wenger and I’m sure their relationship is great, no signs of anything otherwise. What Wenger can’t control is outside shit. Like Özil being railroaded in the media and scapegoated by fans.
Going further with the interview analogy, you can tell someone “I had a great interview, I crushed it I’m confident I’ll get the job”, and in the same breath throw in “but you never know.” I’ve been passed up for lesser candidates because of many factors out of my control. I was the best candidate, was prepared, had a lot of experience but the company went with the manager’s cousin just because.