For foreign football fans visiting Russia, there are additional concerns over hooliganism and the 'racism, nationalism, homophobia and sexism' that has been well-documented in Russian football

Opinion: Is Russia worthy of hosting the football World Cup?

Athletes have, on occasion, mounted successful defences of sabotage in doping cases.

Opinion: Why are athletes doping in Olympics?

Doping scandals have dominated the build-up to the 2018 Pyeongchang Olympics.

Opinion: Russian Olympic doping calls for different approach in future Olympics

All of this started when a documentary revealed Russian athletes of being guilty of doping

Tainted once, Russia again faces doping scandal: A history

Athletics' governing body the IAAF welcomes CAS ruling, says Russia doping ruling creates 'level playing field'

CAS bars Russian field athletes from Rio Olympics, draws ire from Moscow