"I can only state that the period since that particular match has been difficult,'' said the Norwegian. "I've never been fully fit since that episode.''
"It's been pretty frustrating - I've been through three operations so it's been a period I would rather forget,'' Haaland told Sky Sports News.
"I'm still injured. I've had a scan again that should tell me if I require more surgery.
Once more for the record, repeat after us:
IT. WAS. A. DIFF. ER. ENT. KNEE.