Young-Sam Ma

World Tour

Smooth operators, Busan ready to welcome the world

03 Jul 2019

Invitation to umpire at 2018 World Junior Championships

27 Jul 2018 Umpires and Referees

Perfect partnership writes next chapter in Korea Open history

20 Jul 2018 World Tour

Invitation to umpire at 2017 World Junior Championships

07 Aug 2017 Umpires and Referees

New structure, Young-Sam Ma takes the chair

21 Jun 2017 Umpires and Referees