KIERAN Tierney is ‘the best British-born full-back in Britain’ according to former Celtic striker Chris Sutton.

The 20-year-old put in a superb performance during Tuesday night’s 2-1 Champions League defeat to Bayern Munich, a day after putting pen to paper on a new six-year contract with his boyhood club.

Scouts from as many as 17 Premier League clubs are understood to have been sent to Parkhead for the match to cast an eye over Tierney and team mate Moussa Dembele.

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And Sutton told BT Sport after the game that he rates the Scotland internationalist higher than any other British player, including several high-profile stars plying their trade south of the border.

“He’s the best British-born full-back in Britain for me,” he said.

“He’s 20-years-old, you look at the likes of Kyle Walker, 28, Ryan Bertrand, 28, Danny Rose – good players.

“But that boy is going places. And Celtic have done the right thing, they’ve put him on a six-year contract and I’d love to know what the trigger clause it.

“It has to be £30million-plus at least. “