The Mexican striker was concussed during training in the United States.
Antonio Valencia is also returning after he hurt his ankle at the Copa America with Ecuador.
"Maybe we'll get Chicha a game in the Reserves," the manager revealed on MUTV. "He's now in full training with us and we'll look at him in a week's time.
"He's coming along fine and should be back in a couple of weeks.
"With Valencia, we wanted him playing on Monday but he thought he needed another few days, which was understandable. He's trained very, very well and will probably play on Thursday."