Russian skiing champion Yulia Chepalova will next week file a $1 million lawsuit against German sportswear giant Adidas for alleging using her name without her permission.

Reports in Moscow say Chepalova will hold a press conference next week to outline her case in which she claims Adidas unlawfully used her name and image to promote its products.

Her lawyers claim such "illegal" use has been going on for four years and has hurt her relations with other sponsors.

Adidas has yet to comment on the allegations.