Kieran Tierney's career at Arsenal has seen him face plenty of challenges in terms of serious injuries and competition with teammates.
Mikel Arteta was keen on signing a left-sided defender in the summer transfer window, which led to the arrival of former Manchester City star Oleksandr Zinchenko. The Ukraine international completed a £30million transfer to the Emirates Stadium and started the season ahead of Tierney at left-back, as the Scottish defender continued to recover from an injury that saw him miss most of pre-season.
Tierney soon regained his starting spot after Zinchenko was hampered with his own injury problems, but in recent weeks Arteta has opted for Japanese defender Takehiro Tomiyasu at left-back. An impressive display against Liverpool saw Tomiyasu retain his spot and now Tierney looks set for another battle to regain his place in the starting XI.