GABRIEL MARTINELLI marked his Arsenal debut with a memorable goal which led manager Unai Emery to hint he could have a role to play in the first-team this season.
The Brazilian teenager is the Gunners’ only signing so far this summer.
Gabriel Martinelli scored Arsenal’s third goal against Colorado Rapids using his chestGetty - Contributor Martinelli celebrates on a dream debut in the USGetty - ContributorThe 18-year-old was expected to develop in the academy during his first year in England...