The 19-year-old returns to Spain for his third loan spell away from the Gunners to earn valuable experience, having never made a first-team appearance for the Premier League side
Arsenal's promising youngster, Wellington, has joined Ponferradina on a season-long loan.
The 19-year-old's move to the Segunda Division side will be his third temporary spell in Spain after featuring 16 times for Alcoyano in the same league last season - scoring three goals - and also playing for La Liga outfit Levante the year before.
A statement on the Gunners' official website read: "Everyone at Arsenal wishes Wellington the best of luck for the coming season at the Estadio El Toralin."
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The attacker has never made a first-team appearance for the north London side, having been loaned out on his arrival, but did represent them as a trialist in pre-season friendlies against AFC Wimbledon and Boreham Wood in 2010.