Arsenal thrashed Fiorentina 3-0 in their third pre-season friendly on Saturday night.
The Gunners had earlier beaten Colarado Rapids 3-0 and saw off Bayern Munich 2-1.
Unai Emery named another young squad to face the Serie A side at the Bank of America Stadium.
And he was rewarded for his faith, as 20-year-old Eddie Nketiah struck twice to give Arsenal a two-goal lead, before Joe Willock wrapped up the win.
The victory kept up their 100% record in the International Champions Cup.
They play Real Madrid next, as preparations for the new season continues.