Sunglasses firm Oakley challenges Nike over Rory McIlroy sponsorship

American sunglasses maker Oakley has launched legal action to try to retain its sponsorship of world number one golfer Rory McIlroy, who is set to become the new face of sportswear giant Nike.

US PGA champion McIlroy is poised to rubber-stamp a 10-year deal with US company Nike worth as much as US$250 million, according to media reports.

Nike is set to supply the 23-year-old Northern Irishman's clubs and have its name or logo on his clothing in an exclusive deal.

However Oakley, owned by Italy's Luxottica, is challenging the move and started legal action in its home state of California last month.

"Oakley's contract with Rory has a right of first refusal that permits us to retain Rory as an Oakley endorser by matching any offer he receives covering our products," the company said.

"These types of provisions are common in the industry. Oakley values Rory and will do all it can to retain him," it added.