The Daily Star says Van Persie has yet to be convinced by new Old Trafford boss Moyes, who replaced Sir Alex Ferguson in the summer.
The Dutchman has told pals he is missing Fergie, who was key in persuading him to quit Arsenal for Old Trafford a year ago in a £25m deal.
A close friend said: "Robin isn't happy and when that's the case he can't hide it on the pitch.
"When he's frustrated he is capable of doing something silly, and you could see that against Liverpool.
"He feels it isn't the same with the new manager as he misses working with Fergie, who he really loved playing under. Some of Moyes' training methods are not to his liking either."
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