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FILE - In this Tuesday, May 24, 2016 file photo, an employee walks into the building of the Russia's national drug-testing laboratory in Moscow, Russia. Vladimir Putin's spokesman says Russia is "optimistic" ahead of a World Anti-Doping Agency ruling Tuesday Jan. 22, 2019, on whether the cou…

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In this photo taken on Tuesday, May 24, 2016, a piece of scientific equipment in Russia's national drug-testing laboratory in Moscow, Russia. Vladimir Putin's spokesman says Russia is "optimistic" ahead of a World Anti-Doping Agency ruling Tuesday Jan. 22, 2019, on whether the country's auth…

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FILE - In this Tuesday, May 24, 2016 file photo, Grigory Dudko opens a door for journalists during a visit to Russia's national drug-testing laboratory in Moscow, Russia. Vladimir Putin's spokesman says Russia is "optimistic" ahead of a World Anti-Doping Agency ruling Tuesday Jan. 22, 2019, …