Celtic fullback Kieran Tierney is a summer target for Manchester United.

United ran the rule over Celtic full-back Tierney during last weekend's international clash between Scotland and England at Hampden Park.

The 20-year-old played the full match as the World Cup qualifier ended in a 2-2 draw.

The Daily Star says he was watched by three United scouts on the day.

Celtic value him at £15m but are not looking to sell him this summer.