Arsenal manager, Mikel Arteta, will be without Gabriel Martinelli for the second leg of their Champions League last-16 clash with FC Porto.
Martinelli suffered a foot injury last Monday during their 6-0 win over Sheffield United in the Premier League.
The 22-year-old missed the 2-1 win over Brentford on Saturday and was seen on with a protective boot and walking on crutches after the game as he headed through the mixed zone.
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