Barcelona's teen star Lamine Yamal already has a bad back

Barcelona completed match preparations without Lamine Yamal on Saturday ahead of their Valencia encounter. The Spanish forward missed the morning session due to lower back discomfort. Medical staff will assess his condition before Sunday's fourth-round La Liga fixture at Johan Cruyff Stadium. Team officials expressed uncertainty regarding his availability for the upcoming contest. The club already faces multiple player absences with Frenkie de Jong, Gavi, and Alejandro Balde unavailable for selection.