The attacking midfielder has failed to integrate into the team in the way that many expected.
While the Brazilian is a regular, his displays are often underwhelming.
And the form of Ousmane Dembele means that Coutinho often has to make do with a place in central midfield, which is not his best position.
ESPN believe Barcelona would be willing to sell Coutinho for £90 million or more.
"Barcelona do not have a firm offer from any club at this point, but some have expressed an interest in the player," a source at the club told ESPN.
"Key people, who are either directly or indirectly linked with various clubs have been following the situation closely."