The North London club, who remained unbeaten during their pre-season, finished their summer preparations for the new campaign with an impressive 3-2 win over Manchester City on Sunday.
The 20-year-old, who scored the equaliser for the Gunners, told arsenal.com: "We have done very well in our games.
"We just need to use that confidence throughout the season. We're all good, everyone's good, everyone's smiling and everyone's happy.
"Now we're just looking forward to the season."