Unai Emery Says Arsenal Youngster Ainsley Maitland-Niles Must Keep Improving

​Unai Emery has admitted that he's pleased with the progress made by Ainsley Maitland-Niles, but has warned the young fullback against resting on his laurels.  A product of Arsenal's famed Hale End Academy, Maitland-Niles made his debut as a 17-year-old back in 2014, but did not begin appearing regularly for the Gunners until last year's campaign under Arsene Wenger.  Despite playing the bulk of his age-grade football at his preferred position of centre midfield, Emery has deployed... Via All the latest breaking football news, transfer rumours, analysis, and match reports - 90min http://www.90min.com/