And Wenger thinks Ozil's performances were the result of the pressure and criticism he faced before the tournament.
And Wenger, who coached Ozil at Arsenal for five seasons before leaving north London this summer, believes the midfielder was playing without a killer instinct.
There's demands from inside the German Federation that Ozil explain his decision to be photographed with Turkish president Recep Tayyip Erdogan before the World Cup. When I watched him play I could feel that there were situations in the game where he could have moved forward, progressed, played more vertically.
The Frenchman, speaking to beIN Sports, said: "I know Ozil well, he's an exceptional football player".
"Ozil is a guy who needs support, he doesn't need controversy".
He played security. I was thinking come on, that is not the real Ozil I know, the guy who can kill.
"He played alright, but he didn't play with complete freedom and played with the handbrake on this World Cup".
Ozil will continue his club career under new management, with Unai Emery replacing Wenger at the Arsenal helm before the start of the 2018-19 season.
Ozil, 29, has been urged to retire from worldwide football after becoming the scapegoat to Germany's recent shortcomings at the global showpiece.
He said: "If I were in his place, I would say: "Thank you, but that's enough".
"Him and [Ilkay] Gundogan suffered with what happened before the World Cup because they have been vindicated in Germany".
"He doesn't always have to defend himself". He's played in the national team for nine years... and became a world champion. He's booed and put up as a scapegoat - I completely understand that he is offended.