The Gunners are still trying to sign the Scottish full-back before the transfer deadline, but Nigel Winterburn has doubts over his experience
Ex-Arsenal defender Nigel Winterburn has questioned Unai Emery's pursuit of Celtic's Kieran Tierney, suggesting he might struggle with the transition into the Premier League.
The Gunners have reportedly been chasing the 22-year-old throughout the summer window, but have not yet been able to meet Celtic's £25 million ($31m) valuation.
After club-record signing Nicolas Pepe's arrival at Arsenal, Emery has his sights set on one or two extra additions before the August 8 deadline, with the defence still in need of some surgery.