The All-Russian Sambo Federation (RSF) and Indonesian Sambo Federation (ISF) held online seminars for referees during the coronavirus pandemic.
The RSF staged its first online referee seminar on July 22 and 23.
More than 250 judges from different regions of Russia took part in the event.
As part of the seminar, a conference was held on combat and beach sambo, the rules of sambo were explained and judges completed a theoretical test.
Roman Bolotsky, chairman of the RSF panel of referees, said similar seminars are set to be held in the future.
The ISF's online seminar took place on August 1 and was attended by 82 judges from 26 provinces in the country.
The governing body's President and secretary general, respectively Krishna Bayu and Sukma Every Lisa, organised the seminar.
Experienced referees from Indonesia acted as mentors during the event.
Both seminars were held online due to the COVID-19 pandemic.