The red-hot Mexican hitman can do no wrong, with 14 goals in 24 appearances this term.
Boss Fergie said: "It's a terrible dilemma when I've got that lad there.
"Sometimes I leave him out to bring in Robin van Persie but, as I explain to him, we regard him so highly. He's a fantastic professional, unbelievable attitude to the game, never stops running or working and every training session's the same.
"So I'm really pleased for him and it's also good to see Wayne back scoring."