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15/11/2015, 19h49
Russian athletes missing the 2016 Rio Olympics to ensure a clean Tokyo 2020 Games would be a "price worth paying", says UK Athletics chief Ed Warner.
The athletics federation of Russia has been provisionally suspended from international events after a report alleged "state-sponsored" doping.
The "longer-term quality" of the Olympics rests on the sport "being seen to be clean", Warner told BBC Sport.
"If you've got to have pain in Rio to ensure Tokyo is clean, so be it."
Speaking on BBC Radio 5 live's Sportsweek, he added that, while he would like Russian athletes to be in Rio, he does not want a "murky compromise" to allow their return.
Thomas Bach, president of the International Olympic Committee, previously said he believed Russian athletics would resolve its doping issues in time to field competitors in Rio.
The athletics federation of Russia has been provisionally suspended from international events after a report alleged "state-sponsored" doping.
The "longer-term quality" of the Olympics rests on the sport "being seen to be clean", Warner told BBC Sport.
"If you've got to have pain in Rio to ensure Tokyo is clean, so be it."
Speaking on BBC Radio 5 live's Sportsweek, he added that, while he would like Russian athletes to be in Rio, he does not want a "murky compromise" to allow their return.
Thomas Bach, president of the International Olympic Committee, previously said he believed Russian athletics would resolve its doping issues in time to field competitors in Rio.