Arsenal boss Mikel Arteta has two concerns over William Saliba behind Europa League snub (Image: GETTY) Arsenal manager Mikel Arteta is eager to see William Saliba improve in two key areas of his game before he becomes a first-team option at the Emirates. Saliba was left out of Arsenal's 25-man squad for the Europa League group stages earlier this week. Related articles Arsenal missed out on Houssem Aouar transfer because of one person Guendouzi wants to revive Arsenal career in message to Arteta The 19-year-old arrived in north London after a season-long loan at Saint-Etienne and was expected to play an important part under Arteta this term. But following the arrival of Gabriel Magalhaes...
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