Against a plucky Leicester side at a packed and tense Emirates Stadium, Arsene Wenger's men scored twice in the last 10 minutes - first through substitute Aaron Ramsey before the much-maligned Giroud headed in the victor off Granit Xhaka's corner.
Arsene Wenger has confirmed that he gave Olivier Giroud the chance to leave Arsenal this summer, but the powerful striker made a decision to stay put despite rumoured interest from a number of suitors including Everton.
Aaron Ramsey and Olivier Giroud came off the bench snatch victory from the jaws of defeat for Arsenal, who opened the 2017-2018 Premier League season with a topsy-turvy 4-3 thriller against Leicester City.
Arsene Wenger saw substitute Olivier Giroud score a late victor to see off Leicester before admitting he gave the striker a chance to leave the Emirates Stadium this summer.
Arsenal record-signing Alexandre Lacazette got off to a flawless by scoring inside two minutes of kickoff.
Olivier Giroud came off the bench to head a late victor after Aaron Ramsey had brought Arsenal level at 3-3 following a Jamie Vardy double for the visitors.
Premier League Preview and Prediction: Arsenal vs Leicester City
Aaron Ramsey equalised in the 83rd minute and two minutes later substitute Giroud rose highest to head home via the woodwork. Arsenal have made a "huge breakthrough" in contract negotiations with playmaker Mesut Ozil , according to a recent report.
Many observers may have thought Giroud's days at Arsenal were numbered following the arrival of fellow France striker Lacazette from Lyon for a club-record £46.5m fee.
"It is fantastic", Wenger replied when asked about Giroud's willingness to fight for his place. He also labelled the former Montpellier marksman as being "in his prime" and "at the top of his game".
"I went to a three-man midfield to get us a screen because Mesut Ozil was playing in the pockets and I wanted Wilfred Ndidi to get in and around him".
"I'm happy we handled it well in the end", said Cech, who joined the Gunners from Chelsea in 2015.
"I feel as well that the goals we conceded, we can work together to get rid of that because one was a ball we lost in the build-up and we conceded two goals on corners". I'm disappointed with the handball in the build up, but once the corner's given you have to defend it better.