US Open finalist Jannik Sinner is hopeful the wrist injury he sustained in a fall during Friday's semi-final win over Jack Draper will not be a bother during the final.

Top seed Sinner, the first Italian man to reach a US Open singles final, received medical attention beside the court during the gruelling straight-set win, while his opponent vomited three times in the New York heat.

"The physio (loosened) it up very fast on court, so I felt OK in the beginning. Then, after, it went away by playing, which is good," Sinner told reporters.

"Let's see how it is when it's cold. It's going to be a different feeling. Hopefully, it's nothing to concern about."

The Australian Open champion, who faces American 12th seed Taylor Fritz in the final on Sunday, said he expected a difficult match, playing against a home favourite hoping to end the host nation's 21-year men's grand slam drought.

"Big serve... Very solid player from the back of the court. He can hit strong. He can hit with rotation. He can mix up the game very well," Sinner said.

"We're in New York playing against an American, so it's going to be, for sure, the crowd a little bit more on their side. But it's normal. It's like when I play in Italy... so I'm going to accept that."

Rest after final

Sinner will not compete in the Davis Cup Finals group stage next week in Bologna, Italy captain Filippo Volandri announced on Saturday.

“As far as Jannik goes, who told us he was available for the latter stages of the competition in Bologna... we decided to relieve him of his call-up and allow him a full recovery,” Volandri said in a team announcement.

Sinner led Italy to the title last year, posting wins over Novak Djokovic in both singles and doubles in the semi-finals against Serbia and then earning the decisive point in the final against Australia by beating Alex de Minaur.