Real Madrid legend Roberto Carlos has weighed into the Iker Casillas issue.

The Brazilian sees his former teammate being frustrated as he continues to be frozen out by coach Carlo Ancelotti.

"When a leader who wants to be a starter and cannot, does not accept that another is in better form, maybe that's what has happened," Roberto Carlos told AS.

"It had to be sorted out in the locker room. Iker was before irreplaceable and now not so much, but he has to accept and adapt to the new situation because he knows that he will have minutes this season."