The England worldwide, who scored twice in the game, watched helplessly as Arsenal came from 3-2 down to grab an incredible 4-3 victory over the Foxes.
Intriguingly, it is a former Arsenal forward with whom Lacazette now shares his record.
Rooney scores as Everton beats Stoke 1-0 in Premier League
Rooney's goal was the only moment of note in a tiresome opening period. Everton will grind out a hard-fought win in this one. Odds of 7-10 look good for a home win.
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".
With 65 minutes on the clock Wenger turned to Ramsey and Giroud, the former nearly making an instant impact by narrowly missing the target when getting on the end of a left-sided cross.
"He doesn't want to leave and I'm happy he wants to stay". The future of Alexis Sanchez is unclear but Wenger has suggested he is prepared to keep the striker for a season and then let him leave on a free if he will not sign a £300,000-a-week contract.
You've got a £50m budget to pick 11 players, with all the biggest new signings ready and raring to go ahead of a mouthwatering new Premier League campaign.
"Lacazette is getting stronger in every game and tonight he put in a very convincing performance".
Alexandre Lacazette starts for Arsenal in season curtain-raiser against Leicester
But Wenger revealed after the dramatic clash that Giroud "decided to stay" at the Emirates and he is "really loved" at the club. I think if you read the French papers, they are on Mbappe's case to finish their transfer market".
"He is really loved here, we love him and, in the end, he made a decision to stay". "To come here and score three has to be pleasing in some respect, but it doesn't feel like it".
"I'm disappointed with the handball in the build-up, but once the corner's given you have to defend it better", he said.
Arsenal is not just pursuing a first league title since 2004 but also a return to the top four - and Champions League qualification - after finishing fifth in May.
"I felt that to lose tonight would have been bad for us because we had such good preparation and to sit there in the morning and think we had lost at home would have been awful", he said.
Fenway Sports Group speak out on Philippe Coutinho's Liverpool future
The Brazil playmaker has been targeted by Barcelona , whose bid of around £90million was rebuffed by Liverpool on Wednesday. Jurgen Klopp spoke on the importance of Philippe Coutinho while discussing Liverpool's plans for this transfer window.
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