Dubov did not show up for the game, so he was given a forfeit loss.
The Russian refused to play a match with the Dutchman Anish Giri in a mask, the press service of the tournament reports.
At the same time, the organizers of the competition specify that the 25-year-old grandmaster from Moscow passed a negative test for coronavirus infection.
Dubov is the 2018 World Rapid Chess Champion.
Earlier it was reported that Dubov became fourth at the 2021 World Blitz Championship.
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The official statement regarding the absence of Daniil Dubov in round 7 of the #TataSteelChess Tournament pic.twitter.com/1BYKIyN8qm
— Tata Steel Chess (@tatasteelchess) January 22, 2022