Arsenal looked sharp after their mid-season break as they romped to a 5-0 victory over Crystal Palace, but there are a number of injury concerns. Gabriel Magalhaes was the star of the show, as he headed in to open the scoring before scoring a second from another set-piece shortly after, but the strike was later credited as an own goal from goalkeeper Dean Henderson. The Brazilian delivered a magnificent performance in both boxes as he was colossal at the back and decisive in attack, but he sparked fears as he went down with an injury in the late stages of the game, and was replaced by Jakub Ki…