Lacazette has been settling into life at the north London club after having signed for the Gunners from French side Lyon in the summer transfer window last year.
The French striker has been regularly substituted in the second half of games this season despite having started up front often for the Gunners this term.
And Wenger has lifted the lid on why he has regularly opted to bring the striker off in recent games.
Speaking in an interview with Arsenal magazine, Wenger said: “He was in an adaptation period where I felt that, without any objective measurement, that sometimes he struggled a bit more in the second part of the game, especially in the last 20 minutes, to create the movement he can.
“I put that down to an adaptation period.
“It was not so much physically – that didn’t drop so much – it just looked like he was a bit less sharp.”
Lacazette has been out of action for Arsenal since picking up a knee injury in the Premier League defeat by Tottenham at Wembley on 10 February.
The 26-year-old has returned to training at London Colney this week though, meaning that he could be in contention to feature for the Gunners in their Premier League home clash against Stoke City on Sunday afternoon.
The Gunners are currently sixth in the Premier League table and looking as if they will finish outside the top four once again this season.
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