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Undefeated Thai boxer Wanheng Menayothin (L) spars with unidentified boxer ahead of the World Boxing Council (WBC) mininumweight division title fight against Panamanian challenger Leroy Estrada (not pictured), at a gym in the outskirts of Bangkok on April 27, 2018. [Photo: AFP]
After a career laden with belts, cash and kudos, boxing great Floyd Mayweather Jr retired undefeated over 50 fights — but his flawless record faces an unlikely challenge from an obscure Thai fighter known as the “dwarf giant”.