The defender was forced off during last night's Basque derby after picking up a knock on 25 minutes.
The Real Sociedad left-back pulled up sharply as he appeared to hold his thigh during the match against Athletic Bilbao.
Tierney is a vital cog in the machine for the national side. The former Celtic ace sets up at left-centre-back, with Andy Robertson deployed in the left-wing-back role. If Tierney's injury is as bad as has been initially feared, he will also miss the friendly match against France during the next international window.Meanwhile, Park Ji-Sung was an underappreciated, yet integral, cog in one of Sir Alex Ferugson’s most dominant eras at Manchester United but the South Korean will always be the trailblazer for Asian footballers.
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