Paul Pogba is "unhappy" at Manchester United and "has to change teams" in January, says his agent Mino Raiola.

The France midfielder's contract runs until June 2022 but he would be available to leave on a free transfer from next summer.

He has made only eight Premier League appearances this season, starting five games.

"Paul is unhappy. He is no longer able to express himself as he would like and as expected of him," Raiola said.

He told Tuttosport: "He has to change teams; he has to change the air.

"He has a contract that will expire in a year and a half, but I think the best solution for the parties is to sell him in the next market."

Raiola said it was not Pogba's "intention" to extend his contract.

Pogba, who rejoined United from Juventus for £89m in 2016, has made no secret of his desire to play for Real Madrid.