Oleg Stoyanovskiy/Artem Yarzutkin, Russia (14) defeated Abubakarr Kamara/Lombie Patrick, Sierra Leone (38) 2-0 (21-15, 21-15).
It was the first FIVB World Tour meeting between the two teams.
In Pool K, Russia is 1-1 and Sierra Leone is 0-2. Also in Pool C, Italy's Daniele Lupo/Paolo Nicolai is 2-0 and Christopher McHugh/Damien Schumann of Australia is 1-1.
Up next for Russia is Italy while Sierra Leone plays Australia. Both matches are Tuesday, 1 August.