The former Arsenal striker came on as a substitute at Everton on Monday but the boss felt he did not see enough of the ball. Hopefully, that will change as his new team-mates become more in tune with the reigning Footballer of the Year.
"I am excited myself about Robin van Persie," said Sir Alex. "He is a very good player. He brings a maturity to us up front. I am looking forward to him starring when he starts.
"The important thing for us is he brings something to the team. His goal record last year hopefully transmits itself to our goalscoring performances and give us more of a goal edge. Wayne [Rooney] got 30 last season and he has been improving his goal total for the last few years. We need that goal contribution from all the strikers.
"We know Chicharito is capable of scoring goals in a different way to Robin and Wayne. Danny Welbeck is also a different type of player. It does give us fantastic options. That is the biggest attraction to me."