Was just 17 when he made his first-team debut for Celtic having progressed through the academy. Four years later, he left having won four Premiership titles, captained the club and been part of the historic treble treble winners. But injuries restricted his appearances in Glasgow - and in London after his move to Arsenal. Due to the presence of fellow left-back Andrew Robertson, he has had to play in a variety of positions for Scotland.
Arsenal manager Mikel Arteta may be a step ahead of everyone in the transfer market, with Kieran Tierney a pawn in his game
Arsenal have altered their transfer plans – perhaps due to an ACL injury picked up by Jurrien Timber
Newcastle United are set to bolster their squad with yet another signing - and this time it's from a Premier League rival
Arsenal are prepared to let a player depart the Emirates Stadium to a rival, as Mikel Arteta changes his mind on his side
Arsenal are looking to continue their summer squad clear-out as transfer deadline day gets closer and closer
Arsenal are busy in the transfer market but Mikel Arteta appears to have made a huge u-turn over a transfer which seemed certain just weeks ago
Arsenal boss Mikel Arteta has spoken about bringing in even more reinforcement to his stacked squad, despite adding considerably already
Arteta has given the green light for multiple squad members to be sold this summer to make room for new arrivals
Arsenal could significantly change their transfer plans this summer following a spectacular u-turn over one player
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