We didn't lose the game because of Wenger as many tend to suggest . The reasons are simple:
1) Chelsea is not an easy team to beat at home.
2) The referee did not give us advantage to certain deserved situations
3) we did not capitalise on the few chances we created
4) we did not deal well defensively with the occasions which led to Chelsea goals .
None of these are Wenger mistakes . He just took full responsibility as a manager.