Four Vietnamese referees have been invited to head to the London Olympics.
They are Vu Xuan Thanh (taekwondo), Nguyen Dinh Nghia (boxing), Bui Dinh Cuong (gymnastics) and Nguyen Thanh Ha (badminton).
This is the biggest group of Vietnamese referees yet involved in the Games.
Thanh took part in the 2000 Sydney Olympics, when taewondo martial artist Tran Hieu Ngan won a silver medal./.