Journalist Charles Watts has now had his say on how he expects Arsenal to handle the future of on-loan defender Kieran Tierney. Arsenal allowed Kieran Tierney to join Real Sociedad on a season-long loan deal in the recent summer transfer window. The Scottish left-back fell down the pecking order at the Emirates Stadium last season, following the arrival of Oleksandr Zinchenko from Manchester City. The Ukrainian is able to play the left-back role in an inverted fashion, meaning that he habitually drifts into the middle of the park to bolster the Gunners’ midfield unit when they are looking to c…