The Gunners secured a 5-4 victory on penalties against the Ligue 1 side after the scores were tied at 1-1 after full-time.
Youssef Fofana gave Monaco the lead, before his effort was cancelled out by Eddie Nketiah before half-time.
Former Liverpool forward Takumi Minamino's penalty miss proved costly in the shootout, as the Gunners were victorious.
Google have taken notice, and if you type 'Arsenal' into the search engines, fireworks will be shot across the page.
Of course the competition is purely a pre-season fixture hosted at the Emirates, which involves Arsenal and an invited opponent.
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It began in 2007, with the Gunners' recent win being the 12th edition of the tournament.
Though the victory has been overshadowed by the news of an injury to Gabriel Jesus.
The Brazil international will miss the start of the Premier League season and be out for a few weeks due to a knee injury, according to boss Mikel Arteta.
Declan Rice was given his first start at the Emirates in an Arsenal shirt and featured for 60 minutes, after previously signing from West Ham.
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The Gunners face Manchester City in the Community Shield on Sunday.
Before then welcoming Nottingham Forest to the Emirates a week later, in their Premier League opener on August 12.