The shot-stopper made numerous saves as the English side earned a 1-1 draw in the Champions League on Tuesday.
Wenger praised the Colombia international for his display, but said he already knew of his – and Petr Cech's – quality.
"I have two world-class goalkeepers, I will repeat that. I know we have enough games to give them games," he said, via the club's website.
"But if you cannot play… you cannot keep as well two world-class goalkeepers that don't get games."
Cech was left on the bench as Ospina made his first appearance of the season for Wenger's men.
