Salt Lake City, Utah - Gwyneth Paltrow is expected to appear in court over claims the Iron Man star seriously injured a man in a "hit-and-run" crash at a ski resort in 2016.

Paltrow is being sued by retired optometrist Terry Sanderson, who alleged that Paltrow skied "out of control" and hit him at Deer Valley Resort in Park City, in Utah.

Sanderson claimed that Paltrow collided with him "knocking him down hard, knocking him out, and causing a brain injury, four broken ribs and other serious injuries."

Opening statements in the jury trial are expected in the case on Tuesday, with proceedings scheduled to last eight days.

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Paltrow and members of her family are reportedly also to attend court, and the actor is expected to testify.

Sanderson is seeking damages of $300,000, having had his previous claim for $3.1 million dropped.

"This case involves a hit-and-run ski crash at Deer Valley, Utah, where defendant Gwyneth Paltrow skied out of control and hit the back of Terry Sanderson, another skier, who was downhill, knocking him down hard, knocking him out, and causing a brain injury, four broken ribs and other serious injuries," the original claim, filed in 2019, stated.

"Paltrow got up, turned and skied away, leaving Sanderson stunned, lying in the snow, seriously injured."

The filing also stated that a Deer Valley ski instructor, who had been training Paltrow saw Sanderson injured but also made no attempt to help him.

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The instructor did not send for help and later accused Sanderson of having caused the crash in a "false report to protect his client," the filing stated.

Sanderson previously said that he waited to file the lawsuit for nearly three years because he had problems with lawyers and could not function properly because of the concussion.

Paltrow later filed a counterclaim, alleging that Mr Sanderson had hit her and delivered a full "body blow." Her suit said she was shaken by the collision and stopped skiing with her family for the day.

It added that Sanderson apologized to her and said he was fine.