Kieran Tierney, born on 5 June 1997 in Scotland, is a diligent full-back currently gracing the pitch for Arsenal. Standing at 1.78m (5ft 10in) and weighing 76kg (11st 13lb), he dons the number 3 jersey for the North London club. His market value stands around the €10.00m mark (£9m), as noted by Transfermarkt, with his contract with Arsenal due to expire on 30 June 2025.
His footballing journey began in earnest with Celtic, joining the Premiership side in Scotland back in July 2014. It was during the 2014 - 2015 season that he made his first senior appearances for the club, totalling two that season. The following season of 2015 - 2016 saw Tierney begin to make a real impact, making 23 first-team appearances and notching his first goal. The 2016 - 2017 season continued on much the same trajectory, with Tierney finding the back of the net once more across 24 games.
By the 2017 - 2018 season at Celtic, Tierney had firmly established himself as a first-team regular. He made 32 first-team appearances that season and added a further three goals to his tally. His final season, 2018 - 2019, saw him make 21 appearances for the club.
In August 2019, Tierney made the switch from Celtic to Arsenal. His transfer fee was reported to be around £25m. Apart from a brief loan stint with Real Sociedad, Tierney made 15, 27, 22, 27 and, so far this season, three first-team league appearances for Arsenal in the seasons respectively from 2019 to the current season of 2024 – 2025, scoring three goals in total. During his Spanish jaunt in the 2023 - 2024 season, he made 20 top-tier appearances for Real Sociedad.
Tierney has also had a taste of cup and European football, making one substitute appearance in the FA Cup and one starting appearance in the League Cup for Arsenal in the 2024 - 2025 season. He also featured as a substitute in a Champions League match for Arsenal in the same season.
