Emery opted to play several of his senior stars for this one, with Mesut Ozil, Alexandre Lacazette, and Pierre-Emerick Aubameyang all starting, before they were replaced by several youngsters later on.
Arsenal head coach Unai Emery is pleased with the work of young football players.
The second-half saw the likes of Reiss Nelson, Robbie Burton, Saka, and Tyreece John-Jules all come on as substitutes.
"We have lots of high-quality players, but whether that's ultimately enough in terms of breadth to go into the season?"
But after his encouraging performance in the pre-season win at LA Galaxy's Dignity Health Sports Park, fans now want to see Nketiah used on a more regular basis.
"Players like Hernandez and Benjamin Pavard can only help us. Things have already been done, but we need more".
"We now have 17 field players". Meanwhile, new signings from either side are likely to get a run-out as well as they look to gel with the squad.
Arsenal's Eddie Nketiah during the UEFA Europa League, group E match at Emirates Stadium, London.
Next up for the Gunners is a clash against Serie A side Fiorentina on Saturday night before they face Real Madrid next Wednesday.