Calafiori injury 'a worry' as Arsenal have 'questions to answer'

[Nickie]

Arsenal boss Mikel Arteta says defender Riccardo Calafiori's injury during the 1-0 win over Shakhtar Donetsk is " a bit of a worry."

More... (https://www.bbc.com/sport/football/articles/cyvyvr72zero)