JAN KIRCHHOFF is the latest Sunderland player to be hit with a long term injury.

The German midfielder suffered ligament damage to his knee during Wednesday’s 1-0 defeat to Chelsea at the Stadium of Light and had to be replaced 33 minutes before the end.

After further examination it has been revealed he is facing a substantial length of time out. Sunderland have ten players out through injury ahead of tomorrow’s visit of Watford, although Victor Anichebe and Steven Pienaar will undergo late fitness tests.

Moyes said: “We have lost Kirchhoff which looks like a lateral meniscus tear done in the game. He will see the specialist. There is a tear there.”

Kirchoff could be out for three months with Sunderland already without Lee Cattermole, Paddy McNair, Duncan Watmore and Lynden Gooch for the long term.

Sunderland’s commercial director, meanwhile, is to leave the club.

There have been a number of changes at boardroom and football level since Martin Bain was introduced as chief executive and Gary Hutchinson’s 17-year stint at the club will end.

"I have been offered an exciting opportunity to embark on the next stage of my career, which I am really looking forward to,” said Hutchinson.

“Of course I am saddened to leave behind some wonderful colleagues, friends and clients, but I will take so many positive memories and incredible experiences with me.

"I would like to sincerely thank Ellis Short, Martin Bain and Angela Lowes for their support and friendship during my time at the club and everyone I have worked alongside during my 17 eventful years.

"I have been a Sunderland supporter all my life and I will continue to follow the club with tremendous pride. I wish David and the team, along with everyone associated with Sunderland, the very best of luck for the remainder of the season and beyond.”