Nitto ATP Finals - Previews

LONDON, ENGLAND - NOVEMBER 08: (L-R) Dominic Thiem of Austria, Novak Djokovic of Serbia, Matteo Berrettini of Italy, Roger Federer of Switzerland, Rafael Nadal of Spain, Alexander Zverev of Germany, Daniil Medvedev of Russia and Stefanos Tsitsipas of Greece pose for a photo outside The O2 Arena during previews for the Nitto ATP Finals at The O2 Arena on November 08, 2019 in London, England. (Photo by Clive Brunskill/Getty Images)