The Spanish left-back arrived at the Emirates Stadium on transfer deadline day from Malaga in a deal thought to be worth around £8m.
He was handed an immediate debut during the 1-0 victory over Stoke City and Wenger has confessed that he was more than happy with what he saw from the 26-year-old.
"There is no better culture shock than Stoke when you come from Spain," the manager told the club's official website. "They had a very physical game and I think he dealt well with it."
Nacho has made nine appearances for the Spanish national team.