Left Back

Celtic player Kieran Tierney iin action during the pre-season friendly match between Celtic and Newcastle United at Celtic Park on July 19, 2025 in Glasgow, Scotland. (Photo by Stu Forster/Getty Images)
Kieran Tierney’s return from Arsenal instantly elevates the left-back slot to international standards. However, it’s a fragile strength — Tierney’s injury record is well known, and with only Hayato Inamura as cover (a modest signing with no top-level European experience), this position represents the first real area of risk. Should Tierney face a prolonged absence, Celtic may regret not moving sooner for further reinforcements such as previously linked Keita Kosugi.

Hayato Inamura of Celtic FC in action during Como Cup match played between Al-Ahli and Celtic FCat Giuseppe Sinigaglia Stadium on July 26, 2025 in Como, Italy. (Photo by Claudio Villa/Getty Images)
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