Gabriel Martinelli’s hamstring injury has seen Arsenal’s January transfer window gamble backfire almost immediately. The Brazil international hobbled off in midweek during the first half of his side’s Carabao Cup semi-final second leg defeat against Newcastle.

Arsenal winger Gabriel Martinelli faces more than a month on the sidelines with a hamstring injury suffered during Wednesday’s EFL Cup loss at Newcastle United. Early indications suggest that is the duration Arsenal are set to be without the 23-year-old Brazil international.