Arsenal predicted line up to take on Porto: One change from Brentford win, injury to keep big name out

After such a long wait to return to this competition, Arsenal won't want to be dropping out early, especially as there's a case for saying Mikel Arteta has done such a good job with them.

As the line up above shows, Arsenal are not quite at full strength due to Gabriel Martinelli looking doubtful for this game.

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