Rio Ferdinand believes Mikel Arteta made a crucial error earlier this season that could prove costly in Arsenal's pursuit of the Premier League title.
The Gunners are currently on a 15-match unbeaten run in the top flight, but remain seven points behind league leaders Liverpool.
Arteta's men got another three points on the board on Saturday as two late goals from Mikel Merino sealed a 2-0 victory at Leicester.
The makeshift striker popped up with two important goals, but it was another forward, 17-year-old Ethan Nwaneri, who really caught the eye as he caused Leicester problems all afternoon before setting up the opening goal.