Oksana Korobchuk is to serve a doping ban until 2028 following RUSADA's appeal against an original two-year suspension ©Getty Images

The Russian Anti-Doping Agency (RUSADA) has successfully extended the ban of rugby sevens player Oksana Korobchuk from two years to eight for the athlete's second anti-doping rule violation.

It comes after the National Centre for Sports Arbitration in Russia agreed with the appeal of RUSADA, who sought a larger ban than what was handed out by the Disciplinary Anti-Doping Committee.

Korobchuk was a member of the Russian team that were crowned European sevens champions in 2016.

She previously tested positive for the use of illegal steroid stanozolol in 2016 and was banned for four years as a result.

A second suspension was given to her for the use of meldonium, another performance-enhancing drug, with the sample and ineligibility period beginning in October 2020.

Meldonium has been a banned substance since 2016 and was infamously used by Russian tennis player Maria Sharapova, who was given a 15-month ban for using it in January 2016 at the Australian Open.

Oksana Korobchuk was part of the Russian team that won the European Championships sevens title in 2016 ©Rugby Europe
Oksana Korobchuk was part of the Russian team that won the European Championships sevens title in 2016 ©Rugby Europe

If RUSADA had not successfully appealed, Korobchuk could have theoretically competed again by late 2022, however by this time, she had already retired from the sport at the age of 39.

Instead, now the sentence will not expire until October 21 2028.

"Despite the fact that this was Korobchuk's second anti-doping rule violation, the Disciplinary Anti-Doping Committee decided to disqualify the athlete for two years for meldonium," said a statement from RUSADA.

"RUSADA, disagreeing with this decision, turned to the National Centre for Sports Arbitration [which] took our side and imposed an eight-year ban - four years and four years, as usual, repeated violation is punished."

In line with the World Anti-Doping Code, a second anti-doping rule violation that would be worth a four-year suspension if it was a first breach, is usually doubled - excluding any exceptional circumstances.