The Chilean forward was heavily linked with a move to Manchester City on transfer deadline day, with reports claiming the Gunners had accepted a bid of £60m.
The proposed move to the Etihad failed to materialise and Wenger is now hopeful the player will only concentrate on his football this season.
"Your interest is always to perform and he is 100 percent committed, I have no doubt about that," Wenger told beIN SPORTS.
"It's very difficult for me to speak about what happened because what I want the player to do now is focus on his career, on his season and on Arsenal Football Club.
"I spoke before about integrity and values and I always make sure my commitment is at the level expected from the people who pay me and have confidence in me.
"I think the players' side is exactly the same."