Inter Miami co-owner Jorge Mas is quietly confident signing Barcelona captain Lionel Messi.

Messi's contract at Barcelona has just three weeks left to run before he becomes a free agent and while he is expected to renew, he has previously expressed a desire to play in MLS before retiring.

"David and I have been working really hard, we have aspirations of bringing the best players here and Messi is a generational player, arguably the best player of all time," Mas told the Miami Herald.

"I am optimistic Messi will play in an Inter Miami shirt because I think it will complete the legacy of the greatest player in our generation and will meet with the ambitions of the owners of Inter Miami to build a world class team."