This photo taken on January 31, 2018 shows the current World Boxing Council (WBC) mini-flyweight champion, Wanheng Menayothin, taking out his mouthguard during a training session in Bangkok. Unsung outside the boxing world, the Thai fighter nicknamed the "dwarf giant" is quietly closing in on Floyd Mayweather's undefeated 50 fight record and with it an unlikely place among the sport's greats. Pic/ AFP PHOTO

Unsung outside the boxing world, a Thai fighter nicknamed the "dwarf giant" is quietly closing in on Floyd Mayweather's undefeated 50 fight record and with it an unlikely place among the sport's greats. At 5ft 2in (1.57m) and weighing just 105lb (47.6kg), minimum-weight Wanheng Menayothin is shorter, leaner and significantly less wealthy than "Money" Mayweather, the brash American who was teased from retirement last year by a $100 million purse to fight MMA star Conor McGregor.