Arsenal are confident of signing Kieran Tierney for £18 million this summer, according to the Guardian.

The left-back is one of Celtic’s most prized assets, having matured into a top class player in recent years.

The 22-year-old would be a big loss if he did leave Parkhead, with interest in him no great surprise.

Arsenal have emerged has the front-runners to sign the defender this summer, as Unai Emery looks to add quality to his squad.

The Gunners have already had a £15 million bid for the Scotland international turned down by Celtic, but they believe £18 million could be enough to get their man.

The Hoops value Tierney at £25 million, but the player’s rumoured willingness to move to north London could see a smaller bid accepted.

Arsenal believe the youngster can have a similar impact to that of boyhood Celtic fan Andy Robertson at Liverpool, who has matured into one of Europe’s best left-backs.

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