Lionel Messi has reiterated that he will stay at Barcelona for as long as the club wants him.

The Spanish champions have yet to reach a deal with Messi, whose contract runs until 2018.

But the 29-year-old told Coach Magazine: "I have always said that Barcelona has given me everything and I am here for as long as they want me to be."

Messi also gave his backing to former Barcelona head coach Pep Guardiola, who has struggled to match expectations in his first season in the Premier League.

"It is a very competitive league, last season showed that, so it makes it very difficult to predict," said Messi.

"Of course Pep is a very successful coach, he will be adjusting to the league, but I am sure that he will be successful."