Tokyo Olympics gold medalist Alexander Zverev has been fined $40,000 by the ATP and will forfeit more than $30,000 in prize money and all rankings points from the Mexican Open after hitting the chair umpire’s stand with his racket following a loss in doubles at the tournament.

Daniil Medvedev was struggling so much with the suffocating heat and humidity in the Olympic tennis tournament that at one point the chair umpire asked him if he could continue playing.