Nitto ATP World Tour Finals - Previews

In This Photo: Stefanos Tsitsipas
Stefanos Tsitsipas of Greece plays a forehand during a training session prior to the Nitto ATP World Tour Finals at O2 Arena on on November 14, 2020 in London, England.
(Nov. 13, 2020 - Source: Clive Brunskill/Getty Images Europe)