While all of this is surely just coincidence, the fact remains that, in one of the Winter Olympics' central sports, Russians had to endure a lot in both cases to achieve a hard-won victory for their national identity and pride.
Despite the IOC's vote, the Russian Olympic Committee says it expects to be reinstated "in the next few days".
On Friday, Russian bobsled officials confirmed to the AP that Sergeeva had failed a doping test. (Athletes from Japan and Slovenia also tested positive.) Alexander Krushelnitsky, competing in mixed doubles curling, tested positive for banned substance meldonium and returned his bronze medal. Bach repeatedly tried to pass the buck to WADA and the worldwide sports federations, saying Russia was their concern post-Pyeongchang and that the case was all but closed as far as the IOC is concerned.
Sergeyeva, who finished 12th in the two-woman bobsleigh, "is excluded from the Olympic Winter Games Pyeongchang 2018", CAS said in a statement.
"They (IOC) were due to look at how we behaved here and decide, but as we've got two doping cases".
The IOC suspended Russia from the Winter Olympics in December following allegations of state-sponsored doping, though 168 athletes were granted permission to compete under a neutral flag as Olympic Athletes of Russia (OAR).
If the suspension is not lifted, the Russian athletes will march behind the Olympic flag and in neutral uniforms.
After being warned that their conduct would affect the I.O.C.'s decision, Russian athletes have largely been keeping a low profile in South Korea.
"In terms of Russian athletes, I believe clean Russian athletes should be allowed to compete because I believe they shouldn't pay for the sins of their fathers".
Despite a good collaboration from the OAR delegation to respond to these (doping) cases in a prompt and transparent way, the implementation group was convinced that these cases caused significant concern, Mr Hoevertsz said.
"This is not a decision everyone will be happy with", Hoevertsz said after Sunday's vote. The fourth place team, Norway, was given that medal.
Before the International Olympic Committee voting, Russia's International Olympic Committee member, Shamil Tarpischev, insisted that the overall team had complied with all established requirements. "It is never going to be business as usual in sport again or in Russian Federation". "I feel like I, with the gold medals, when the Olympics come, I'm like a representative of the Olympics", Wild said.
"We believe this should be the end of this big problem and pave the way for a new chapter in Olympic sport", Tarpischev said.