However the Frenchman had other ideas and headed the team into the lead after fellow substitute Aaron Ramsey had equalised in the 84th minute after a Jamie Vardy brace had put the Foxes 3-2 up on 56 minutes.
It was striker's first shot for his new club and he now becomes just seventh Arsenal player to score on his debut. The spirit of the team was absolutely outstanding. At one stage I opened the door for him to go as I knew I had many strikers, and in the end he made a decision to stay.
He's good enough to do that job of a second striker; what Dzeko did for Man City for two or three years when they were winning titles: you had Aguero as the number one man but he played a huge role.
Worryingly for Arsenal, Arsene Wenger has sold Wojciech Szczesny and loaned out Emi Martinez, meaning that David Ospina, who is rumoured to want a move away from the club this summer, is Cech's only competition. It was one of the great days for me in recent weeks [when he said he would stay].
With Arsenal's performances over the last decade under Arsene Wenger seeming to have a pattern of failure to sustain a title challenge, as well as selling our best players to our rivals, we could all be forgiven for expecting more of the same this season considering we have so many players entering the previous year of their contracts.
With the first Premier League match in the books this term, how did pundits, supporters and players react on Twitter to Arsenal versus Leicester?
"With the first corner, we were late. He is focused and happy in the dressing room because we won the game". We have many games and hopefully I can give games to all the strikers.
"There were hard moments when we were down and we managed to get out of that and it's great to see".