Athletic Bilbao have released a statement saying that they did not authorise midfielder Javi Martinez's trip to Munich on Tuesday.

The 23-year-old has already said that he wants to leave the Spanish club this summer, with Bayern Munich keen on signing the Spain international.

Martinez was shown on German television undergoing a medical with the Bavarian giants, but Bilbao claim that they knew nothing about this.

"Athletic Club would like to make clear that at no time did they authorise the trip their player Javier Martinez made to Munich on August 28," reads a statement on Bilbao's official website.

Bayern have yet to make a comment on the matter.