Arteta concedes he's been aware of Adama since his days with Barcelona.
He said, "They link with each other really well.
"Their understanding, their movement, the partnership that they have... they are a big threat. I think Raul, the way he's settled in the country and the player he's become is as well because of the structure that he has in the team that his manager has created, and the players around him as well.
"Adama, I know him from his time at Barcelona, and he's a player that can unlock the door at any moment in the game.
"I always saw incredible potential and that he could develop and evolve certain areas of his game. He was unstoppable to play at times. When he gets service in the right moments and gets isolated, it's so difficult to defend and he is showing that in a constant way right now. Something that is not easy to do for a very talented football player."