The 31-year-old Norwegian says he could see out his playing days in SW6.
He said: "I think it's hard to plan ahead. It may well be [my last club] but at the moment I'm feeling as good as ever, I don't miss games and feel fit, so who knows? I will take it a season at a time.
"We're being looked after so well these days. Our medical staff are fantastic and I think it's possible to carry on longer than it was five or six years ago, so I'll see how long I can go on for."