According to the Mirror, the striker has put his summer of discontent, when he considered his future at champions United, firmly behind him and rediscovered his best form, scoring three goals in his last two games.
Even former United boss Sir Alex Ferguson, whose rift with Rooney threatened to make him quit Old Trafford, paid him a glowing tribute this week, the report said.
Moyes, who takes charge of his first Manchester derby against City on Sunday, believes the stage is set for Rooney to prove he is one of the world's best players, the report added.
The manager said that it is crucial for Rooney to keep his form and if he keeps playing the way he has, the goals would come.
Rooney has 10 goals in Manchester derbies and needs just one more to overtake City duo Francis Lee and Joe Hayes to become the record scorer in his own right, the report further said.
Last season was a difficult one for Rooney, with injuries, indifferent form and questionable fitness, as well as his rows with Fergie, combining to make it one to forget, according to the report. (ANI )