Manchester United have signed three players this summer-midfielder Fred, full-back Diogo Dalot and goalkeeper Lee Grant.
However, Mourinho wants two more signings before his chance ends on August 9.
“One thing is what I would like,” he told ESPN FC. “Another thing is what is going to happen.”
The Red Devils have played two games so far, drawing both.
“We don’t have a team to play much better than we did but [it’s] one more training session,” Mourinho told MUTV following a 0-0 draw against San Jose Earthquakes.