The World Anti-Doping Agency is flying to Russia in a fresh bid to access its drug laboratories, but insisted the nation will not be allowed off the hook for missing a sanctions deal deadline.

Officials from the beleaguered agency arrive in Mosow on Wednesday amid calls to reinstate sanctions against doping control agency Rusada, which has already missed the December 31 final date to provide full access to samples.

A three-person Wada team is now scheduled to "access and extract data from the laboratory information management system" this week, the governing body claims.

However, Sir Craig Reedie, the Wada president facing demands from 16 national anti-doping bodies (Nado) to get Russia suspended again, has insisted the nation could be punished regardless of this week's mission.

He said "we are continuing to act on the basis" that the deadline has already been missed "with all the consequences that failure could bring".