By Wayne Veysey

Celtic face a major battle to hang on to Kieran Tierney this summer amid fears his head has been turned from interest south of the border, Football Insider can reveal.

The left-back, 22, has consistently pledged his loyalty to the Glasgow giants since graduating from their youth ranks to establish himself as a star player in the team that has secured three consecutive domestic trebles.

Celtic had hoped the defender’s love for the club would be enough to convince him to stay for the tilt at an unprecedented 10-in-a-row after sealing an eighth consecutive title last month.

A Celtic source has told Football Insider the club fear Tierney is now seriously attracted to the possibility of moving to the Premier League amid interest from Arsenal and Leicester City.

The Glasgow giants would want well in excess of £20million for their academy product, who is two years into a six-year contract that runs until the summer of 2023.

Tierney’s value to the team is undoubted as is a pedigree and potential that makes him one of the two outstanding players for the Scotland national team along with Liverpool star Andy Robertson.

He broke into the Celtic side aged 17 and has already accumulated 170 first-team appearances and won 11 major trophies, including five league titles.

In other Celtic news, it can be REVEALED that the club are convinced they’ve signed a “diamond” whose value will skyrocket next season.