The 21-year-old’s development has stalled since breaking into the Arsenal senior side under Arsene Wenger aged 17.
He has struggled for game time under Wenger’s two successors, Unai Emery and Mikel Arteta.
Nelson has played in just 22 of Arteta’s 80 matches in charge and played only 69 minutes in the Premier League last season, despite the club’s struggles.
His potential departure would also free up a space for Arteta to continue his shake-up of the Arsenal squad.
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