Medvedev – World Class 2nd player won 4 tours for the year 2021, and is expected to continue to maintain the performance at this year's ATP Cup tournament. However, contrary to the expectations, he lost unexpectedly to Ugo Humbert on a hot day in Sydney.

In the first half, the match took place when the two players had a chase of foreign ratio. Ugo Humbert lost with a score of 6-7. The second and third half also took place extremely tense, but then Medvedev was short of breath in the last games and pityed to look at Humbert successfully backwards in the remaining 2 sets with a score of 7-5 and 7-6. In the end, Ugo ended this choking match with a 2-1 victory.
The match took place for 2 hours and 55 minutes under Sydney's hot weather, challenging the endurance of both players. Many people think that this is the biggest victory in Ugo's career.

In an interview, Humbert said that the match was really difficult, but he was happy to win. “I had the opportunity in the first set but lost. However, I always keep my mind comfortable and do the best I can. This is a great match.”
With this victory, France and Russia achieved flowers and had to play more matches decided to win and lose. In the end, the Russian team with the duo Daniil Medvedev and Arthur Rinderknech won against the Edouard Roger-Vasselin and Fabrice Martin of France.
Group B is the death table at this year's ATP Cup when witnessing the presence of the host country Australia and runner -up of the ATP Cup 2021 is Italian. The top team will enter the semi -finals to meet 3 representatives of the remaining tables.