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LONDON, ENGLAND - NOVEMBER 22: Daniil Medvedev of Russia lifts the trophy after winning his singles final match against Dominic Thiem of Austria during day eight of the Nitto ATP World Tour Finals at The O2 Arena on November 22, 2020 in London, England. (Photo by Clive Brunskill/Getty Images)

LONDON, ENGLAND - NOVEMBER 22:  Daniil Medvedev of Russia lifts the trophy after winning his singles final match against Dominic Thiem of Austria during day eight of the Nitto ATP World Tour Finals at The O2 Arena on November 22, 2020 in London, England. (Photo by Clive Brunskill/Getty Images)