Tags: Martial Artist.
Sergio ‘Kleintje’ Wielzen (born November 1 1987 in Suriname) is a Dutch based Surinamese super lightweight Muay Thai kickboxer fighting out of Amsterdam Netherlands for Black Label and FF Carbin. His nickname in Dutch is ‘Kleintje’ – which translates as ‘Little One’ in English. Despite his deceptively small stature he is known for his explosive power – having won many of his fights by KO or TKO. He is the former (and first ever) It’s Showtime 61MAX world champion.