Andrey Rublev of Russia returns the ball to Stefanos Tsitsipas of Greece (unseen) during their Mubadala World Tennis Championship match at Zayed Sports City in Abu Dhabi on December 19, 2019. (Photo by - / AFP) (Photo by -/AFP via Getty Images)
Andrey Rublev of Russia returns the ball to Stefanos Tsitsipas of Greece (unseen) during their Mubadala World Tennis Championship match at Zayed Sports City in Abu Dhabi on December 19, 2019. (Photo by - / AFP) (Photo by -/AFP via Getty Images)