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These two teams don't like each other. That's obvious.
But things started getting chippy in the final 20 minutes of the game. Players from each team were shoving each other while referee Chris Foy and his assistant were discussing whether or not Lukas Podolski's goal should be disallowed.
Mikel Arteta and Michael Owen got into a bit of a scrap as well. Arteta made a totally legal tackle that sent Owen crashing to the ground. As he got up, Owen threw a shot at Arteta. Unfortunately for Owen, Jack Wilshere saw the whole thing and immediately got into his face.
But the moment that summed up the match the best involved Ryan Shawcoross, a tackle and the area of Laurent Koscielny where the sun never shines. No more description needed there.
Nevertheless, it gave the Gunner faithful even more reason to boo Shawcross, the man who left Aaron Ramsey's leg in pieces a couple seasons ago.
This game was heated, and it made for some great entertainment.