The two sides meet at the Bird's Nest Stadium in Beijing and Wenger accepts the fixture between the FA Cup winners and the Premier League champions will not have the feel of a friendly given the history between them.
"There is some pride at stake and a desire to win. It was a very interesting game in the FA Cup final, we play them in the Charity Shield [Community Shield] and then play them early in the [Premier League] season as well.
"In fact, we know each other very well and it is difficult how to know how prepared Chelsea are and how far we are for the preparation tomorrow. It was a good indication against Bayern, it will be another test for us tomorrow."