Lacazette's stunning headed opener on two minutes underlined Arsenal's undoubted brilliance on the front foot; an attacking ability strengthened by the arrival of the club's record signing.
Since the start of last season, Giroud has scored seven Premier League goals coming off the bench - three more than any other player in the same period.
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The pair played the final last week in Washington, with Zverev winning to claim his fourth title of the season. I always said that the ranking, if you're not No. 1 in the world, doesn't count really. "I was not as fast".
Shinji Okazaki heads in the equaliser from close range.
Arsenal fans heading to the Emirates would have been desperate to see Lacazette get off to a fast start at his new club.
Mesut Ozil played a pass in to Lacazette, who tried to turn and fire, but his shot was fortuitously deflected right to Kolasinac, who unselfishly tapped across for Welebeck to score. But for Arsenal the same old problems at the back resurfaced in worrying fashion in their curtain raiser with Leicester. "I just think we are not open - what I said to you many times - to any offers, anyway".
He drove at Arsenal's defence and his sublime whipped cross found the England global who couldn't miss from inside the six-yard box completely against the run of play.
"We saw it though for 83 minutes", Leicester manager Craig Shakespeare said, "and to concede two late set-plays in the manner we did is obviously hard to take".
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Crude oil futures are slipping USD0.10 to USD48.49 a barrel after tumbling USD0.97 to USD48.59 a barrel on Thursday. The South Korean won sank around 0.8 per cent to 1,133.8 to the dollar, its lowest since July 14.
Eleven minutes into the second half Vardy restored Leicester City's lead. Wanting an offside call, the Leicester defense nearly all simultaneously stop and raised their arms.
After a much-needed break for all involved to take a deep breath, the second half started in much quieter fashion until ten minutes into the second period.
Arsene Wenger will be delighted if Lacazette puts in more performances like this. "As a game is in 90 that would guarantee you a goal".
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".
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Aside from geopolitical concerns, gold-focused investors are awaiting USA inflation data set to be released on Friday (August 8). The market was waiting f or US consumer inflation data on Friday that would offer more clues about future Fed decisions.
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