Rashford was superb for victory over Crystal Palace on Saturday.
And former Tottenham striker Garth Crooks wrote for BBC Sport: "Marcus Rashford absolutely rinsed Crystal Palace defender Joel Ward for United's first goal, then proceeded to terrorise the Eagles for the entire afternoon.
"The look on Palace manager Roy Hodgson's face in the dugout said it all. To be fair, Ward deserved more help.
"To leave the Palace defender so isolated, especially in the first half against a player of Rashford's pace and agility, was short-sighted and he deserved back-up.
"It was like watching a great white shark tossing its prey about before devouring the poor soul. It took Palace far too long to plug that gap. It was Palace's right side where all their problems seem to come from. Ashley Young also provided the cross for Fellaini's goal from that side.
"With no points on the board, and indeed no goals, Palace look in a perilous situation. But they do have the quality in the side to do something quite miraculous.
"If so, they are going to have to show far more courage than they did at Old Trafford. Fortunately they won't have to play against Manchester United - or someone like Rashford - every week."