Greek tennis player Stefanos Tsitsipas.
Tsitsipas managed to play the only match in Italy, in which he lost in two sets to Russian rival Andrei Rublyov on Monday. The remaining participant in the Green Group is the world number one Novak Djokovic.
Twenty-six-year-old Norrie will make her season debut. He won the position of substitute after a year in which he advanced to the finals six times at the ATP circuit, won his premier title in Los Cabos, Mexico in July, and celebrated his triumph at the Indian Wells Masters in October. In a duel with Ruud, he will have the opportunity to retaliate for the October finals in San Diego, where he suffered a debacle of 0: 6 and 2: 6.
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The twelfth player in the world, Norrie, will enter the Champions Tournament as the second substitute. Italian Matteo Berrettini, who shortened the opening match with Alexander Zverev in the Red Group, also finished prematurely in Turin. Jannik Sinner, a compatriot and ranked eleven, replaced him.
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