Arsenal's Alexis Sanchez has reportedly become a father after the woman who he allegedly cheated on his girlfriend with gave birth to a son.

The former Barcelona star is alleged to have had an affair with Mary Plaza during his relationship with current girlfriend Laia Grassi.

According to El Mundo, Sanchez has refused to acknowledge that the child is his, but Ms Plaza is reportedly not planning to force the footballer to take responsibility for the baby.

Ms Plaza's grandfather is believed to be one of the founders of Spanish giants Barcelona.