Lacazette nearly had his second of the night just minutes later, but Leicester keeper Kasper Schmeichel turned the shot aside, but Giroud beat the Dane with an exquisite header on the ensuing corner to give Arsenal the 4-3 victory.
Wenger further reiterated the point in his written press conference, describing Giroud's decision to remain with Arsenal as a "relief" and "one of the greatest days I've had in recent months".
The Foxes were ahead twice despit Lacazette scoring just two minutes into his EPL debut, becaue as well as we played in midfield and attack the defence was shaky, with an unfamiliar trio of Holding, Monreal and Kolasinac drafted in.
"I opened the door for him at some stage as it's important for him to play but I don't want him to go", Wenger said at the post-match news conference.
"I think in the future you will see that more and more, players going to the end of their contracts", he declared.
While Lacazette's goal was fantastic, it resulted in a number of other players' efforts being overlooked and unrecognised.
Wenger added: "We know defensively we can do better but overall we produced a top-quality game. As a game is in 90 that would guarantee you a goal (in every game)". He is adapting to the way we want to play.
As always is the case, Arsenal begin their 2017-18 Premier League campaign with high hopes. Manchester City are said to be circling, but Paris Saint-Germain and Bayern Munich's interest appears to have cooled. "We had 27 attempts and they had three on target and three goals, but it's something we have to work on".
Diacre, who won 121 caps for France, was in charge of Clermont Foot for three seasons and finished 12th, 7th and 12th.
"On that level I am not super optimistic".
I would see him fitting at PSG rather than Man City because of the different competition.