LONDON, ENGLAND - NOVEMBER 22: A general view of the action, without line judges due to Covid-19, between Dominic Thiem of Austria and Daniil Medvedev of Russia during the singles final match 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)
