Galal Yafai: Francisco Rodriguez Jr returns ‘adverse finding’ after shock win over Briton

Francisco Rodriguez Jr faces an anti-doping investigation after his shock win over British flyweight Galal Yafai, says Matchroom Boxing.

Yafai’s promoters have been told the Mexican returned an adverse analytical finding following his points victory in Birmingham last month.

Rodriguez, 31, dropped the Olympic gold medallist in the final round and was a clear winner with scores of 119-108, 119-108 and 118-109.

It was Yafai’s first professional defeat as he surrendered his WBC interim title, but the result is now in question.