The match was Mark Bowen's first as new Royals manager.
The game finished 2-2, with Sam Baldock netting both of Royals' goals.
The former Brighton man had given Reading the lead, before an Arsenal team - which included senior pros Mesut Ozil, Ashley Maitland-Niles, Hector Bellerin, Rob Holding and Shkodran Mustafi - hit back.
Baldock had the last laugh though as he claimed his second goal to earn Royals a draw.
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