Thai boxer Wanheng Menayothin clinched his 50th straight victory on Wednesday, defending his WBC title against a Panamanian challenger and tying the undefeated record of boxing great Floyd Mayweather Jr.

The 32-year-old Thai nicknamed the “dwarf giant” reached the milestone in the fifth round of the minimum-weight championship bout against Leroy Estrada in the northeastern Thai city of Nakhon Ratchasima.

Wanheng’s quest to equal “Money” Mayweather has drawn interest between the unheralded, soft spoken Thai and the brash and vastly more wealthy American.

At 5ft 2in (1.57m) and weighing just 105lb (47.6kg), minimum-weight Wanheng Menayothin is shorter, leaner and significantly less wealthy than Mayweather, the brash American who was teased from retirement last year by a $100 million purse to fight MMA star Conor McGregor.