Teenager Hector Bellerin will start for Arsenal tonight against Borussia Dortmund.
The news was confirmed via Twitter by reserve team goalkeeper Damian Martinez.
First choice Arsenal right-back Mathieu Debuchy suffered an injury at the weekend against Manchester City which is expected to rule him out for two months.
Carl Jenkinson has been loaned out to West Ham, where he started on the bench last night against Hull.
19-year-old Bellerin is a former Barcelona trainee, who has never made a competitive start for the Gunners, but he did impress in the recent Emirates Cup pre-season tournament.