Dick Advocaat says Sunderland are letting down their fans.

Advocaat quit the Black Cats last week.

He stated: “Now, I am at home in Holland and I need some time off, but no way will I ever look for another club in England.

“Sunderland as a club, with all the fans, was fantastic. What I have experienced with the fans is something I will never forget.

“But I saw other things at the club that were not right.

“That's why I informed the owner in the midweek before my last match that there was no way I was going to stay as manager.

“It was very simple. I loved being manager of a beautiful club like Sunderland.

“But, when you are working seven days a week, putting so much energy into the team, you want something positive in return. That just didn't happen."