For the majority of his career he has fought low level opposition in Switzerland, building up an undefeated record of 29-0 with 21 knockouts.
[3] He has trained with world champions such as Vitali and Wladimir Klitschko, Tyson Fury and other top fighters as a sparring partner.
Gjergjaj won the EBU-EE European heavyweight title in October 2014, beating Adnan Redzovic by a knockout in the 9th round.
[4] He defended his title against Denis Bakhtov in June 2015, winning on points despite suffering a broken hand and burst eardrum, and being knocked down in the fifth round for the first time in his career.
[12] He has been involved in fields such as developmental aid organization Terre des Hommes Switzerland and has shown commitment to helping the youth in his hometown, where he opened his own boxing club "Arnold Boxfit" on 23 January 2016.