Both players are ruled out of this weekend’s game with West Ham and speaking to the press at Carrington on Friday, van Gaal explained that Rojo’s dislocated shoulder was a repeat of the injury he picked up against Manchester City last year.
“It was already in the media – Rojo has been injured,” van Gaal saaid.
“It’s his shoulder, the same as last year, in a training session. It’s very unfortunate, also in the position of Luke Shaw, so I have a great problem.
“Also the injury of Wayne Rooney is more heavy [serious] than we thought, so neither can play. That’s it I think. Jesse Lingard is coming back which is good news. Phil Jones is still injured so we have six injuries.”
As for Rooney, van Gaal then added that he is already undergoing rehabilitation in training to work on his recovery.
He added: “It’s a nasty injury. It’s been getting worse but we have to let him train to make the ankle stronger, that’s very important. I cannot say [how long he’s out for] because the doctor shall decide that with Wayne of course. He is training well in the rehabilitation.”
The players who could return quickly are Herrera and Jones but the other four are likely to spend a bit of time on the sidelines.