Jose Mourinho's decision on Ainsley Maitland-Niles is set to cost Arsenal millions in transfer windfall this summer, according to recent reports.
The Hale End academy graduate joined Mourinho's AS Roma on loan until the end of the current campaign, with an option to buy reportedly set at around £8-£12million.
However, Italian outlet Calciomercato have reported that the Italian side are unlikely to take up that option this summer after he failed to impress the former Chelsea and Tottenham Hotspur boss since making the switch from the Emirates Stadium.
