Arsenal splashed out £52m for the France striker in the summer.
He’s made a decent first impression at the Emirates so far, netting twice in five games for the club.
But Wenger is keen to see Lacazette adapt his game to suit the Premier League.
“He still needs to adapt to the physical aspect, on the other fronts there are no problem at all,” he said.
Alexis Sanchez is Arsenal’s star man but he’s not been a regular starter this term.
And Wenger has discussed why the Chilean hasn’t been the first name on the team sheet.
“There is no disguised attitude on my side, I just try to get him back to full fitness,” the Gunners boss said.
“I try to give him competition and to get him back to his best. He had a long holiday and he came back not really fit, then he got injured.
“But last night (against Doncaster) you could see he is coming back. I left him on for 90 minutes because I wanted him to have a go.”
Arsenal tackle West Brom on Monday and Wenger knows his side are in for a tough night.
He said: "West Brom have the culture of the Premier League, a manager who knows how the league works.
"They are very strong on set pieces, solid defensively - it’s tough to score against them."
