Giroud scored the winning penalty in the Community Shield last Sunday and, having finished last season with the best goalscoring ratio of any Arsenal striker, continued that form by coming on last night to clinch victory in a dramatic seven-goal thriller.
Such an effort provoked scenes of sheer jubilation at the Emirates Stadium and came just two minutes after fellow substitute Aaron Ramsey looked to have rescued a point for the inconsistent Gunners after blasting in from close range.
The lead lasted barely three minutes before Marc Albrighton's cross from the left was headed back into the middle by Leicester's new signing Harry Maguire and Shinji Okazaki nodded the ball past flailing Arsenal keeper Petr Cech. After that, though, Leicester City had the Gunners on the ropes for most of the game, taking a 3-2 lead in the second half off of Jamie Vardy's second goal of the match.
"Not only as a player, he is a fantastic player, but as well in the group - he has a big weight in the squad and it was a relief for me that he made a decision to stay".
Ever since France striker Alexandre Lacazette joined in July for a club-record 60 million euros ($68 million), the future of compatriot Giroud has been in doubt.
"I will be remaining at Arsenal", Giroud told SFR Sport.
"I love the man (Giroud) and the player".
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Zidane could also bring in playmaker Isco , and return to a 4-3-3 system by giving Cristiano Ronaldo a first start of the season. Appointed to succeed Rafa Benitez in January 2016, Zidane opened his tenure with a Champions League triumph.
Asked if Giroud could still leave before the transfer window closes on August 31 until January, Wenger replied: "No".
"Well if you were a manager and you would be on the bench when you're 3-2 down with 20 minutes to go, and you win 4-3, you're more happy than concerned", he said. "One was a corner, one on build-up, one on a corner again", he said.
They have won trophies in each of their last two competitive games, beating Chelsea in the FA Cup final last season then in the season opening Community Shield at Wembley.
'Tonight we needed this win, everyone knows the importance of the first game for confidence.
Mahrez, who has been linked with a move to Arsenal in the past 12 months, had been a target for Roma.
"I think we have all seen the amusing business of the transfer window and we never know what is round the corner".