The German international has shone since his £42 million arrival at the Emirates Stadium, grabbing his first of five assists so far just 10 minutes into his debut before opening his account against Napoli in the Champions League.
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"I think it was a great message from the club [to sign Ozil] because everybody was expecting a top, top player - probably a striker more than a No.10 - but at the end we got an amazing player," Arteta told the club's official website.
"I think he has lifted not only us but you can see the people are excited again to come and watch us and it makes a big difference.
"When you have a type of player who is capable of finishing the way he finished his goal it makes the difference between winning and losing those games. He's a very intelligent player, he is quick and his final ball is terrific.
"[Ozil] gives you a step forward quality-wise, and is someone on the pitch who can win the game by himself. The more players you have like that the better chance we have to win the games."