The one-time world number 13 has played just one ATP Tour singles match in two years after suffering knee, foot and wrist injuries.
Barcelona drew first blood, with Yamal's effort from the edge of the box deflecting home off Inigo Lekue's head.
Jordan Chiles' lawyers say they would seek to challenge the ruling on the basis that the CAS judgement was flawed, noting they had video footage which "unequivocally proves" that the
He called Vinesh Phogat, whose quest to win an Olympic medal came to an end for now in heartbreaking circumstances with the Court of Arbitration for Sport (CAS) dismissing her
While Bayern fought hard to win in Hamburg, defending champions Bayer Leverkusen, second-placed RB Leipzig and Borussia Dortmund all dropped points.