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Arsenal operate with a smaller squad than most, and this season has seen manager Mikel Arteta call a number of youth-team players onto his bench as backup. With injuries to stars like Martin Ødegaard, Gabriel Magalhães, Riccardo Calafiori and Jurriën Timber to worry about, it could be sooner than later that we see some of them called into Premier League action, so what do you need to know?
Ahead of Wednesday's clash with Preston in the Carabao Cup, here is a look at some teenagers who have made the breakthrough into the first-team squad this season -- we have left out talented midfielder Ethan Nwaneri as, even though he is still only 17, he has established himself already.