The 58-year old Swede was admitted to hospital after experiencing a bout of painful stomach cramps when the team was in Seattle to defeat the Sounders on the weekend.
Since then, he underwent an operation and it is unsure whether he will make the trip for the Red Bulls' third match.
"Thank God it wasn't anything too serious. It's controlled and the surgery has been a success. All we're worried about is that Hans is back to good health; that's all we're concerned about,'' said assistant Richie Williams. "From what I hear everything went well and he's back on his feet and he's going to have to rest a couple days and he'll be back on the sidelines and back in training.''
Captain Juan Pablo Angel said it was not a huge problem if Backe could not attend whilst he was recovering as the everybody involved knows what plans they have put in place to produce positive results.
"I'm not concerned; if he has to miss a game or two, as long as he recovers well and he can give us what he's good at, his presence when he's healthy, then that should be fine. Right now we're more concerned about his health,'' said Angel. "The basics are there. Obviously Richie knows what Hans wants to implement on the team.
"(There's) still a lot of work to be done, still a lot of things we need to improve. But when you're winning, it's easy when you make changes. At least the confidence is there. Right now, I think everybody is playing with confidence. Regardless if Hans is going to be there or not, I think the system already has been implemented. We already know what to do."