Lacazette was benched as Arsenal ran riot against Everton at the Emirates, thumping Sam Allardyce’s team 5-1.
Pierre-Emerick Aubameyang blossomed on his debut, scoring an outstanding chip to help drive the north London side towards a key three points.
The Gabon striker was picked in an attack also consisting of Henrikh Mkhitaryan and Mesut Ozil, with Lacazette the fall guy.
And, speaking after the game, Wenger appeared to hint Lacazette was now second-choice striker by saying he would get his chances to shine in the Europa League.
“I am very happy with him. We could not afford to let Giroud, Walcott and Sanchez go and bring no one in,” the Arsenal boss said.
“That is impossible. In the Europa League Aubameyang can not play, there are all kinds of possibilities to give everyone games.”
Wenger also praised his side for their dazzling display.
“We had more penetration, a quicker and sharper game, we had a different focus to Tuesday [The defeat to Swansea],” he said.
“It was a repetition of the Crystal Palace game, when we were 4-0 up after 20 minutes.
“I believe the speed of our game was very good, good finishing as well.”
Wenger praised his new signings for taking the game to Allardyce’s hapless Everton side.
“It is very early, but they look to have the quality to integrate into the game we want to play,” he said.
“They are quick, have sharp movement and agile and want the ball. It is very good and positive signs.”