"I am not worried about my contract, I have repeated that on numerous occasions," he told Marca.
"My objectives with the club are longstanding; to improve and to try to win everything that we have already won.
"They say that I am very competitive," he said.
"I like to train, I like to play and I like to win. I have always been like that since I was young, but it would make me very happy if one of my team-mates won the Ballon d'Or, they also deserve it. Without my team-mates I would not have won everything that I have won."
When questioned about his supposed running battle with Cristiano Ronaldo, Messi was quick to play down any talk of a rivalry between the pair and insisted it was nothing more than a media creation.
"I do not compete against Ronaldo, I try to do the best possible with Barca and with Argentina," he said.
"That is something that the press have invented. Neither Ronaldo nor myself competes with the other."