Stefanos Tsitsipas has withdrawn from the Nitto ATP Finals due to a right elbow injury on Wednesday ahead of his second Green Group match at the Pala Alpitour in Turin.

Second alternate Cameron Norrie will take Tsitsipas’ place and face Norwegian Casper Ruud on Wednesday evening not before 9 p.m. Andrey Rublev defeated Tsitsipas 6-4, 6-4 on Monday in their opening round-robin match.

“I have taken the very difficult decision to retire from the 2021 [Nitto ATP] Finals due to my elbow injury, which has been bothering me for a couple of weeks now,” Tsitsipas said. “It’s a very difficult decision from my side and I was working really hard this year to get to play the Finals and be part of this amazing event, but unfortunately I won’t be able to continue.”

The 26-year-old Norrie is making his debut at the season finale following a breakthrough season in which he won his first title at the Mifel Open in Los Cabos and claimed his maiden ATP Masters 1000 trophy at the BNP Paribas Open in Indian Wells.

Norrie has only played Ruud once before, and that came less than two months ago in the San Diego Open final. The Norwegian was victorious 6-0, 6-2.