By Alex Stevens

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Celtic are set to offer Kieran Tierney a lucrative new contract to fend off interest from a string of Premier League clubs, according to a report.

The highly-rated teenager, 18, still has three years to run on his existing contract but the Scottish giants want to reward the huge progress he has made this season.

According to the Scottish Sun, Celtic chiefs are planning to extend his deal until 2021 and hand him a significant pay rise.

Teenager Tierney swept the boards with Scotland’s Young Player of the Year awards after his stunning debut season.

He was named the best young player at Celtic’s end-of-season ceremony and was also named PFA Scotland Young Player of the Year.

Tierney, 18, has enjoyed a whirlwind campaign in which he has made 32 appearances for the Scottish Premiership leaders and been handed a Scotland call-up.

He made his full Scotland debut against Denmark during the March international break despite never having pulled on a dark blue jersey for the Under-21s.

The teenager has already been linked with a lucrative move to Southampton and, as revealed by Football Insider, Liverpool are keeping close tabs on him as they eye someone to compete with first-choice Alberto Moreno on the left side of the defence.

The Scottish Sun report that Celtic hope to secure Tierney on a new deal with talks expected to start with his agent within weeks.

Tierney spoke just last week of a desire to stay at Celtic Park for the long haul rather than make an early jump to England.

He is also hoping for a call-up from Scotland boss Gordon Strachan for the double-header against Italy and France.

In other Celtic news, the Scottish club have watched a £10million-rated English centre-back eight times as they eye up a summer bid.