Kieran Tierney

Kieran Tierney is a 29-year-old Scottish left back at Celtic, where he wears the number 63 shirt. Standing at 180cm and left-footed, he plays in Premiership.

Across 46 appearances and 3,407 minutes in the 2025/26 season, Kieran Tierney has contributed 74 tackles and 23 interceptions to his side's defensive work, also chipping in with 6 goals and 9 assists.

Mercato XI currently values Kieran Tierney at €3.5M, a figure that has cooled in recent months. Playing regularly in Premiership, a defined role at Celtic, and being at a productive age for a defender all support a positive outlook on his value. Read the methodology to learn more about how we estimate player value.