He is the only Thai man to win three Southeast Asian Games singles gold medals (1965, 1971 & 1973).

In 1966 he won the singles title at the Malayan Championships held in Ipoh, Malaysia.

In 1971 he won the Singapore International Championships against Filipino player Eddie Cruz.

In 1972 he was a losing finalist at the Ceylon Championships held in Colombo to Ravi Venkatesa.

A left-handed player, Champisri competed for the Thailand Davis Cup team from 1976 to 1978.