Off contract in June, Messi's frustration at Barca will only have increased with the manner of last night's Champions League defeat to PSG.
Laporta said: "Messi wants to win with Barcelona.
"I will do my best to keep him, but there are particularly interested clubs.
“Leo wants to win titles, not just money. He has never been a problem for Barça, since Messi represents 30% of the club's profits."