Van Persie refused to celebrate converting his spot kick.
Wenger revealed his former striker spent some time in the Arsenal dressing room after the match, joking: "Our food is better in our dressing room than their dressing room".
Wenger said: "That equaliser played a big part in the game. It put us in a difficult position but overall I can only praise the players for the effort and dynamic and desire we put in. Let's keep it going like that and we'll have a chance to be where we want to be."