It's very difficult to say, the worry is that the knee is a genuine weak spot for ings - it always will be, any impact or incorrect movement in that area is going to be a huge concern for everyone.
It's been my biggest fear to be honest, for his sake and our teams sake he needs to be fine - couple of weeks max I hope, that's prob the best case.
I just hope the club don't play cloak and daggers with this one and they tell us from the outset the state of play.