Former Manchester United striker Dimitar Berbatov admits he's worried about the form of Casemiro.

However, he hopes the Brazil midfielder is given the chance to shake off his slump.

Berbato told Betfair: "I hope this is just a bad rumour because it's going to bring unwanted heat towards him in a moment where he's not playing how he used to play.

"So, I hope it's nothing but a rumour and that there's nothing to it. He has shown at Real Madrid how highly rated he is, how he can play top, top football - he showed that at Man United in his first season.

"He's set high standards for himself, so it's up to him to continue to prove to everyone that he's the player that people know he is.

"Time is going by, and he's getting older, so he needs to be smarter in how he plays the game, how he approaches games, how he reads the game."