Paltrow has filed a counterclaim, seeking legal fees and $1 in damages.
The Oscar winner has alleged that Sanderson is overstating his injuries and trying to exploit her wealth and celebrity.
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He demanded Ms. Paltrow pay him millions.

Gwyneth Paltrow.Rick Bowmer-Pool/Getty Images.
He continued: She slammed him very hard.
Sandersons attorney, Lawrence Buhler, said Paltrow was reckless on the slopes.
Steve Owens, Paltrows lawyer, dismissed Sandersons claims as utter BS in court Tuesday, the BBC reported.

The proceedings are scheduled to last for up to eight days.