Arsenal legend Thierry Henry believes Wenger was wrong to remove Giroud when Per Mertesacker was sent off.
Mertesacker was brought off after bringing down Diego Costa, only for Giroud to be replaced with Gabriel in the loss to Chelsea.
Henry has now stated Wenger was wrong to do so, even though he wanted to keep the pace of Walcott and Campbell on the field.
“When Theo stayed and Olivier Giroud went off, we all thought it was because he wanted to go in behind and attack and be higher up the field on the counter,” the Arsenal legend told Sky Sports.
“But I still think if you take Campbell out then you still have Giroud, you still have Theo on the right and Mesut Ozil on the left. You still have good organisation and you have both guys [Walcott and Giroud] on the field.
“It’s easy to talk when you’re here [in the studio] watching the game with no pressure. You have to take a decision in 15 seconds, but I think you could have had the two guys staying on the field.”
Diego Costa’s 23rd minute strike was the difference between the sides as Arsenal missed the chance to move to the top of the Premier League.