Lacazette almost 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.
However, the club did win the Europa League and the League Cup, giving the manager a platform of success on which to build. It was a relief for me he chose to stay.
"It is fantastic", Wenger replied when asked about Giroud's willingness to fight for his place.
"I think it is unsustainable", Guardiola said.
Matic targets Chelsea title
Six teams are very strong and you must be prepared. "There is a lot of games, it's a long season but I expect us to do well". We are the most physical league. "He's working very well and starting to understand or idea of football".
But the French coach knows he has work to do on his defence after Friday's performance in which Arsenal were found wanting at two set pieces that resulted in Leicester goals.
Praising Giroud's response after being left out of the starting line-up, Wenger added: "I love the man and the player".
Meanwhile, Wenger has also commented on the prospect of adding to his first-team squad before the transfer window shuts in September.
"No. It's a determined no", he said.
Arsenal had won just one of their last seven opening-day fixtures and looked destined to start another campaign slowly as the 2015-16 champions took the lead twice only to lose 4-3.
S&P falls 1.4 percent in safety flight on North Korea tensions
Shares of Kohl's were down 8.4 percent, while Macy's fell 4 percent after the department store operators reported a fall in sales. Benchmark U.S. crude fell 97 cents, or 2 percent, to $48.59 a barrel on the New York Mercantile Exchange.
"You will have so many scientists around the team that who will bring out the team to play on Saturday will be more management specialists than football specialists".
"The first goal is on a short corner, we were not focused enough. Winning everything! We are Manchester United and we want to get back to being the big Manchester United", he said ahead of their clash with West Ham this weekend.
"We need to transform the quality of the preparation into points and that is, of course, a pragmatic view, but what matters is we win the game and start in a strong way, which we didn't do previous year".
Guardiola said the current spike in football transfer spending, which culminated in Neymar's recent world record move from Barcelona to Paris Saint-Germain for 222 million euros (£200 million, $260 million), had been building for some time.
Markets Right Now: Stocks open lower
The Nasdaq Composite, meanwhile, was facing its worst week since the one ended December 2, which logged a loss of just over 2%. Earlier on Thursday, North Korea revealed a plan to launch ballistic missiles toward a major US military hub in the Pacific.