Behind Davydova and Ermakova, whose top spot was all but a surprise, came Japanese Olympic and world silver medallists Miya Tachibana and Miho Takeda with 98.000.
Third was the American pair of Bartosik and Koslova, ahead of Spain's Gemma and Mengual and France's Dedieu and Thibaud.
Athens 2004
Russian duet lead way to final
24/08/2004 AT 19:00
The duet free routine qualifying takes place on Tuesday evening, while the duet final will be on Wednesday.
Tokyo 2020
USA's Artistic Swimming performance at London 2012
27/04/2021 AT 10:35
Tokyo 2020
Russia’s near-perfect synchronised swimming routine at London 2012
08/04/2021 AT 15:13