The 27-year-old arrived at the Emirates Stadium on January transfer deadline day in an £8.5million deal from Malaga. The defender produced solid displays in his first taste of Barclays Premier League action against Stoke and at Sunderland, before showing glimpses of his forward ability when his run and cross set up a late winner for Santi Cazorla against Aston Villa.
Wenger is confident with time, Monreal will provide another outlet to the Gunners' many attacking options, and he said in the March edition of the official Arsenal magazine: "The first thing you want from your defenders is to defend well, so we cannot reproach him for that. You will see the other aspects of his game more when his confidence has settled."
He added: "He is good in the air for a guy of his size, has a quick leap and has looked good. Monreal is very strong in other areas too, his crosses for example, and his forward play you will see a bit later.
"It happened with Kieran Gibbs too, the more confident he became the more efficient he was going forward. It can take a bit if time to express that side."
Wenger continued: "There is no better culture shock than to play against Stoke and Sunderland.
"He has not said a word to me about it, but he has spoken with the other players and he has seen all about the passion and commitment of the English game. You can say Nacho Monreal passed that test."
Gibbs has been sidelined with a thigh injury sustained in the 2-2 draw against Liverpool on January 30 - which gave Arsenal little time to hasten a move for Monreal. Wenger had been on the Spaniard's case "for a long time", and was happy to have landed "one of our big targets".
The Arsenal manager admits the January window was a testing period for the club, who came under criticism for not spending big despite obvious shortcomings on the pitch.
"We had a difficult first six months of the season, because we were trying to extend the contracts of all the British players. That demanded a lot of work and then we had to deal with the (Theo) Walcott situation as well during January," Wenger said. ""So personally I am relieved because we dealt with the situation and we extended all of our players (contracts)."
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