Wenger believes that the Argentina international should be crowned once again.
"It's very difficult. For the class, Messi [should win it]," the Arsenal manager said. "He's scored 76 goals in one year. It looks just outrageous to me. Therefore it would be one thing to reward something exceptional.
"Ronaldo has always been there and he deserves it as well. He won the Spanish championship. Iniesta won the European Championship with the national team and therefore, you could reward him.
"I'm not a big fan of these things. If you judge purely on class, you judge Messi. If you want the achievement of the year, you would choose Ronaldo and maybe Iniesta in second. That's how I see it."