Now Luiz will be tasked with keeping the France international quiet - no easy feat after a fine run of form that has seen him score seven times in his last 10 appearances.
"With Oli you can see in the last few months how he is performing, the amount of goals he has scored for them," Arteta said. "We know him, he has the experience in the finals as well.
"In the case of David, it is such a special day for him to play against his former club and hopefully he can do a performance like he did against City in the semi final.
“I'm not surprised [by Giroud's form], because I know Oli. He is a fighter. Even when he was playing for us and he had some difficult moments, he always reacted.
"He always works really hard and comparing with the greatest [forwards the club has had] is like always. They've done it and they did it for long periods where they were really successful at the club. So any comparison with them is always difficult.
"I'm glad that he is doing really well, but hopefully tomorrow he won't do that well."