Medvedev has not only made himself known for his game but also his outspokenness outside the tennis court.
The tournament in Tokyo has been no exception.
He has previously mentioned that the matches should start later in the day - all to avoid the worst heat and high humidity and in Wednesday's match against the Italian Fabio Fognini, the external conditions were just as tough as Medvedev warned.
During the match he was forced to take a medical timeout and when the referee asked about his status the answer was:
- I feel good and can finish the match but I can die.
If I die, does the International Tennis Federation, ITF, take responsibility?
In the end it was a win, 6-2, 3-6, 6-2, but afterwards Medvedev was crass:
- From the first set, it did not feel good with the breathing and I could not breathe properly.
I think this was the day with the most humidity so far.
- Then during the second set I did not see really well.
I was ready to collapse on the track.
Took a cold shower
To make it easier for the players, the ITF has let them take a ten-minute break between sets.
For Medvedev, that time was spent with a cold shower and then it finally became a profit.
In the quarterfinals, the Spaniard Pablo Carreno Busta and perhaps later in the tournament, a meeting with world setter Novak Djokovic awaits.
Later today, the Serbian star will play against Spanish Alejandro Davidovich Fokina.
Britain's Andy Murray's attempt to reach a third straight Olympic gold failed when he lost to the Croatian veterans in a pair with Joe Salisbury
Marin Cilic / Ivan Dodig.
Murray, who has been injured in recent years, won gold in singles in both London 2012 and Rio 2016.