Speaking during his first press conference at the Aon Training Complex, the boss confirmed Rafael will be out of action for up to four weeks with the hamstring injury sustained at Wembley earlier this month, whilst also offering an update on the progress of Ashley Young, Nani and Javier Hernandez.
"Rafa picked up an injury in the Community Shield game so we've lost him for three or four weeks," Moyes told reporters. "We have one or two coming back from injury - the likes of Nani, Ashley Young and Chicharito. They're still recovering.
"So we've got two or three coming back from really the effects of not having a proper pre-season because they came back from international duty a bit late. Hopefully they'll all not too far away now.
"We've got a really squad here and we're able to cope if you do get injuries. But it's only just a case of getting then up to speed because they've missed pre-season."
Monday’s match sees Chelsea visit Old Trafford for an early season dust-up between the two title rivals and, understandably, Moyes can’t wait for the action to begin. The boss is also keen to welcome Jose Mourinho back to the English game following his recent return to Chelsea.
“I really like Jose, he's had great success and I've not seen him for a long time so I’m looking forward to seeing him," the boss explained.