According to the results of the skating, the Russians received 80.16 points from the judges.
The second were Sui Wenjing and Han Cong from China (77.62).
The top three were closed by another representatives of Russia - Anastasia Mishina and Alexander Gallyamov (75.79).
Two-time European champions Evgenia Tarasova and Vladimir Morozov became fourth (71.46).
The skaters will present their free program on March 25.
Earlier it was reported that Boykova and Kozlovsky will show a new short program at the World Championships.