Stefanos Tsitsipas had very high hopes for this year's ATP Finals, even though he didn't play all that great in the previous weeks. His form improved in Paris, and it was good to see, but he was still considered an underdog in his group.
Beyond the shaky form, he apparently had to deal with an elbow injury after abandoning both practices in Turin leading up to his first match that happened on Sunday. He's had some elbow issues in the past and underwent surgery for it, so the reports weren't good news.
It didn't look too bad against Jannik Sinner, even though he lost. The Italian simply overwhelmed Tsitsipas from the baseline, but the Greek looked fine. He confirmed that he was fine after the match explaining that there were no injury concerns.
No, not that I'm aware. I'm absolutely fine and I'm ready to play this tournament. Turin is one of the most important events of the year for me. I'm healthy. I'm ready to compete.
Ultimately, we won't know whether he's truly injured or not because he's not really keen to discuss it. There was nothing indicating major problems in the way he played against Sinner, though elbow injuries can be managed.
He played with one for a long time before addressing it surgically, so he might do that again. If he does elect to withdraw from the event, then the first alternate, Hubert Hurkacz, will be ready to take his place.
The Polish number one is in Turin and has practiced as well. We'll see what happens with Tsitsipas and his ATP Finals campaign as he's facing Novak Djokovic next. A loss would mean he's out of the event.