Cazorla came close to scoring on three occasions and created the best chance of the match for Olivier Giroud. In the end Wenger had to settle for a 0-0 draw but he was delighted with his new Spanish playmaker.
"He played very well and looks like he could be one of the buys of the season," said Wenger to arsenal.com.
"He has everything you want in the game. He can play short, he can play long, on the right or left, he can play the final ball and works hard as well. He is a fighter so it is very positive for us.
"[He settled quickly and] that shows people who say you need to play a long time together. Great players do not need a long time [to settle]."