Sir Alex Ferguson insists he has not set a date for when he will step down as manager of Manchester United.
The 66-year-old had earlier revealed that he was contemplating retiring in three years time.
But Ferguson said: “It’s something I’ve said quite a bit. If your health is good and you are enjoying your job it could be two or three years, who knows?
“I am not going to pigeonhole myself on that one. It could be four years. Who knows, it could be tomorrow if I read some bad press from your mob [journalists] – trying to get rid of me,” Ferguson joked.
“It is impossible to put a time limit on it.”
Ferguson originally planned to retire in 2005 but changed his mind and has continued to enjoy success with United – his most recent triumph being last season’s Premier League title.
United are still in line for the Treble for the first time since 1999 and face Portsmouth in the FA Cup on Saturday.
Ryan Giggs, who has spent his entire career under Ferguson at Old Trafford, believes that his boss maintains the hunger to continue in management.
Giggs, who was signed by Ferguson as a schoolboy 20 years ago, said: “I can’t see it in the near future. He has a hunger for the game and he is enjoying it more than ever.
“He is enjoying the way the team plays and his desire is there for all to see. It has got to happen at some time but I can’t see it in the near future.”