And speaking after the game, the 30-year-old confirmed his intention to stay and fight for his place at Emirates Stadium.
"I felt that to lose tonight would have been awful for us because we had such good preparation and to sit there in the morning and think we had lost at home would have been bad", he said. "Because Giroud is in his prime and is at the top of his game".
"He is an intelligent player who can integrate our game well as we have a game backed on mobility, technique".
Arsenal turned around the league's first Friday opener in the closing minutes at Emirates Stadium.
Have you signed up to play in our fantasy football league? "We had 27 attempts and they had three on target and three goals, but it's something we have to work on".
Now with a weird back four of (from right to left) Alex Oxlade-Chamberlain, Monreal, Kolasinac and Hector Bellerin, Arsenal pushed for an equaliser, and on 83 minutes it came. What a game this was, a seven goals thriller to open the Premier League! One was a corner, one was a ball we lost in the build-up and the third goal was a corner again.
"To win like we did will only strengthen it and overall we have good ingredients in the squad and it is a good opportunity again to show it away from home".
Yes, of course, I am convinced that we won 10 of the last 11 games, and we won against Man City in the semi-final and the final against Chelsea. "To come here and score three has to be pleasing in some respect, but it doesn't feel like it".
"Obviously I knew that I was going to have a chance so we tried to push", he said.