Bańka has confirmed that WADA has put RUSADA under "formal notice" after expressing concerns over the "ongoing delay" in the verdict of an investigation into the teenage figure skater’s failed drugs test.

His comments on social media come just days after WADA urged RUSADA to reverse its decision to keep the ruling of the Valieva case confidential.

"WADA is concerned with the ongoing delay in Kamila Valieva’s case and has now put RUSADA under formal notice that unless the matter is resolved promptly it will use its right to take it directly to the Court of Arbitration for Sport," Bańka wrote on Twitter.

RUSADA has opted to keep its decision private due to Valieva being 15 at the time that she failed a drugs test and therefore a "protected person" under the World Anti-Doping Code.

However, WADA has called on RUSADA to "make appropriate public disclosure bearing in mind the circumstances of the case" and "given the fact this case is already public."

United States Anti-Doping Agency chief executive Travis Tygart has also slammed RUSADA for its plans to keep all proceedings in the case and its final decision secret, claiming that it "makes a mockery of the whole process."

Meanwhile, International Olympic Committee (IOC) President Thomas Bach has asked RUSADA to make Valieva's verdict public to ensure credibility in the process.

"Already in Beijing, we made our position clear by applying to the CAS [Court of Arbitration for Sport] together with the World Anti-Doping Agency (WADA) after it became known about the decision of RUSADA," Bach was quoted as saying by Marca.

"We lost, and now the trial is proceeding according to the rules WADA's privacy policy.

"While RUSADA's position is to remain silent until a final verdict is issued, WADA and the IOC may appeal the result.

"This is the legal side of the issue, but in terms of transparency, we join WADA and ask RUSADA to make the data public so that everyone has more confidence in this procedure."

RUSADA director general Veronika Loginova confirmed to Russia's official state news agency TASS that Valieva’s case will be carried out "in strict compliance" with Russian and international anti-doping standards

"Due to the dissemination of false information in the press and a large number of media requests for comment, on October 21, RUSADA issued an official statement that it did not intend to voice details on this case and answer questions about the hearings," Loginova said.

"In accordance with the standards, the process from the very beginning should have be confidential.

"The decision to publicly disclose the data on the case after the final decision is made remains with RUSADA in accordance with paragraph 17.3.7 of the All-Russian Anti-Doping Rules."

insidethegames exclusively revealed that Valieva had tested positive for the banned substance trimetazidine on February 8, the day after she had helped the Russian Olympic Committee (ROC) to secure team gold at the Winter Olympics.

A medal ceremony has still not taken place for the team figure skating event at Beijing 2022 because of the failed drugs test.

The US finished second, Japan third and Canada fourth - but all could be in line for an upgrade.

RUSADA opted not to provisionally suspend Valieva, allowing the world record-holder to compete in the women's event at Beijing 2022.

The IOC, International Skating Union and WADA all filed appeals to the CAS to have a provisional suspension reimposed, but they were dismissed.

Valieva was therefore able to take part in individual competition with an asterisk by the teenager's name.

She led the women's event at the halfway point but fell several times in the free skate and finished fourth, with ROC team-mate Anna Shcherbakova victorious.