Entire Athletic Bilbao squad shave their heads to support team-mate Yeray Alvarez, who has cancer

The 22-year-old defender Yeray Alvarez is currently undergoing chemotherapy after tests revealed his testicular cancer had returned. He had an operation to treat the disease in December, and was able to return to the field two months later. Alvarez was also named to Spain's squad for the European U21 Championship.

Unfortunately, the announcement came through on June 13 that his cancer had returned after an "abnormality" was discovered.

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