R&B star Rihanna's rumoured boyfriend Matt Kemp has denied their relationship.

The 'Disturbia' hitmaker was romantically linked to the baseball star after they went for a holiday together in Mexico, but Kemp has said that they are just good friends, Femalefirst reported.

"Rihanna is just a friend, a good friend of mine. We went down to Mexico and had fun together," said Kemp.