Mikel Arteta put his non-international players through their paces in a solid hit-out ahead of Monday's clash with Crystal Palace at the Emirates.
Alexandre Lacazette scored a hat-trick in the match as the Gunners dominated possession throughout the match.
Rob Holding made it 4-0 for the hosts before Julian Jeanvier scored a consolation goal for Brentford.
Along with Holding and Lacazette, Bernd Leno, Nuno Tavares, Eddie Nketiah and Charlie Patino also featured.
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