Arsenal have completed the signing of wonderkid Lino Da Cruz Sousa from West Brom as Mikel Arteta makes his first move of the January window.
The 16-year-old has been part of the Baggies' youth setup and has been playing two years above his age group in their Under-18s side.
The left back, who is part Brazilian, has already represented England at Under-15 and 16 level and has been earmarked as a future talent.
West Brom coach Peter Gilbert previously said, via The Sun: 'Lino's an athletic full-back, reads the game well, has a lovely left foot.