It took two bits of magic from Cazorla to rescue the north London club.
Wenger said: "Santi Cazorla played very well and delivered in a game that was very important. He's a great player.
"He has shown he's a great football player and I'm happy and grateful he delivered those two important goals today.
"I didn't expect him to score so many goals for us. He has 11 games to go so he could get a few more.
"For me, he's a complete football player because he also has spirit. He was a bit tired in the last few minutes, but he continued to fight.
"He's a good example to follow. He's happy to come and play and practice every day, and he gives you absolutely everything on a football pitch."