PSG chief Leonardo cannot rule out a move for Barcelona star Lionel Messi in 2021.

Messi is free to negotiate with new clubs from January 1, with his Barcelona contract set to expire on June 30.

"You have to keep the respect; Messi, he is a Barcelona player," Leonardo said after PSG's 3-1 win away at Montpellier on Saturday.

"We don't like it when our players are discussed, so we don't discuss other team's players.

"Now is not the time to think about the transfer market."