Giroud then sent the previously despondent Arsenal fans wild when he headed the victor from a corner, Leicester keeper Kasper Schmeichel only managing to turn the ball onto the underside of the bar before it bounced over the line.
For Arsenal, some positive momentum had already been achieved after beating Chelsea to win the Community Shield, and it continued early Friday, as Lacazette announced his arrival immediately with an unmarked yet hard and instinctive header off Mohamed Elneny's chipped-forward assist to give Arsenal a 1-0 lead. Giroud had been linked with an exit during the summer, and Wenger admitted he considered allowing his most authentic target man to leave but the 30-year-old resisted the idea.
With the injured Alexis Sanchez looking on from the stands, Arsenal took the lead inside two minutes as Mohamed Elneny's cross to the centre of the box found Lacazette, who flicked a header inside the post. But I don't want him to go and in the end he chose to stay. Not only as a player, he's a fantastic player but as well in the group.
"We kept going and the spirit of the team was absolutely outstanding", said Wenger after the game.
"I feel as well that the goals we conceded, we can work together to get rid of that because one was a corner, one was a ball we lost in the build up and the third goal was on a corner again, so we conceded two goals on corners".
"When you are not completely in or the players feel you are not completely in, it is hard to tell them we go (out to win).
We were quite good previous year on corners and overall I believe that with a bit of work we can get that out of the system".
The Frenchman, who has been at the club since 1996, has been given a chance to turn things around despite calls for his head from disgruntled Arsenal fans waiting for a first league title under his stewardship since he led them to the crown in 2004. We have top quality strikers coming back.