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Sponsorships and endorsements

Nadal has been sponsored by Kia Motors since 2006. He has appeared in advertising campaigns for Kia as a global ambassador for the company. In May 2008, Kia released a claymation viral ad featuring Nadal in a tennis match with an alien. In May 2015, Nadal extended his partnership with Kia for another five years. He became the face of Lanvin's L'Homme Sport cologne in April 2009.

As of January 2010, Nadal is the international ambassador for Quely, a company from his native Mallorca that manufactures biscuits, bakery and chocolate-coated products; he has consumed their products ever since he was a young child.

In 2010, luxury watchmaker Richard Mille announced that he had developed an ultra-light wristwatch in collaboration with Nadal called the Richard Mille RM027 Tourbillon watch. The watch is made of titanium and lithium and is valued at US$525,000; Nadal was involved in the design and testing of the watch on the tennis court. During the 2010 French Open, Men's Fitness reported that Nadal wore the Richard Mille watch on the court as part of a sponsorship deal with the Swiss watchmaker.

Nadal replaced Cristiano Ronaldo as the new face of Emporio Armani Underwear and Armani Jeans for the spring/summer 2011 collection. This was the first time that the label has chosen a tennis player for the job; association football has ruled lately prior to Ronaldo, David Beckham graced the ads since 2008. Armani said that he selected Nadal as his latest male underwear model because "...he is ideal as he represents a healthy and positive model for youngsters".

In June 2012, Nadal joined the group of sports endorsers of the PokerStars online poker cardroom. Nadal won a charity poker tournament against retired Brazilian football player Ronaldo in 2014.

In August 2023, Nadal signed up as the brand ambassador for the Indian IT major Infosys. Rafael said: "I’m very happy to work closely with Infosys, as they work to not only evolve the experience of tennis to the times, but also empower people in our communities to be part of a brighter future."