Arsenal were 1-0 up and cruising before Dyer fell under no pressure, fooling referee Michael Oliver into giving a penalty.
Wenger pointed to the example of Robert Pires, who once dived in a game with Portsmouth, as what he thought was a double standard.
“If [Robert] Pires once dived against Portsmouth … OK, for six months, it was a story in the newspapers. [Nathan] Dyer dived on Sunday to win a penalty for Swansea and nobody said a word. If it doesn’t matter when Dyer dives, why does it matter when Pires dives?”