The Ghanian was in full control of the midfield in his first start since returning from injury, with the Gunners running out 3-0 winners at the Emirates.
"I am really happy [with Partey]," Arteta said. "He got better and better as the game went on. He has a big influence and gave us things which were different from any other player. We have to protect him as he's not played that much."
Xhaka added on his midfield partner: "He is very important to our team. He brings aa lot of experience on a high level and he showed today how important he is for us and we our so happy."