Former world champion and Russian star Dmitry Medvedev missed four final points a few days ago, and once again officiated in a round of eight at the ATP 500 Dubai Men's Open.

Russian star Dmitry Medvedev

Medvedev, the 2023 Dubai men's singles champion, failed to deliver on four final points when he led 5-4 in the second set, and lost control of his emotions due to a foul on unsportsmanlike behavior, publicly accusing referee Knoll of adopting "double standards" against Russian players, but Knoll retorted: "I treat all players the same, regardless of nationality." In the end, the top seed first flourished and then declined, and after three sets of hard-fought battles, he was eliminated by the Dutch dark horse Grykspoor, 6:2, 6:7 (7:9), 5:7.

Grykspoor

The 29-year-old Medvedev has had an up-and-down season so far, stopping in the men's singles round of the Australian Open tennis tournament and paying a fine of $123,000 for breaking his racket, breaking the mini camera, and refusing to be interviewed in two matches. In early February, Medviv Rotterdam was warned for not being satisfied with the service time irregularities and loudly reprimanded the referee at the time. Now, after losing in Dubai, he refused to shake hands with Knoll.