Chicharito is expected to join United on the next leg of their journey, to New York, where they will face an MLS All-Stars side containing David Beckham and Thierry Henry at Red Bull Arena on Wednesday.
"It was tough for him last season but over time, Javier will mature and get better," said Ferguson.
"He is improving technically and now he has had a good season behind him in a tough division.
"We are setting targets for him. We thought he would get 20 last season and he did.
"He might do even better this time."