An emotional Lionel Messi says he did not want to leave Barcelona but that a move to Paris Saint-Germain is not confirmed.

Messi was in tears as he received a standing ovation in his final Barcelona press conference to announce the end of his 21 years with the club.

Barcelona confirmed the six-time Ballon d'Or winner's departure on Thursday night, the same day he returned to Catalonia following his post-Copa America holiday.

Messi had travelled to Barcelona expecting to agree on the details of the announcement of his new five-year deal, and he confirmed he offered to reduce his wages by 50 per cent.

"This year, my family and I were convinced we were going to stay at home, that's what we all wanted more than anything," said Messi.

"We'd always made this our own, we were at home. We thought we would be staying here in Barcelona. But today, we have to say goodbye to all of this."

Barcelona president Joan Laporta blamed Messi's exit on the former regime at the club in addition to La Liga spending rules thwarting any hopes of the Argentinian staying in Catalonia.