In the fifth minute, van Persie sent Chicharito through on goal, on the left side of the area. Unfazed by his tight angle, the Mexican lifted a left-footed effort against the underside of Gerhard Tremmel's crossbar. As the ball rebounded to safety, Phil Jones seized upon it and drove into the area after two sublime one-two exchanges with van Persie and Chicharito, only to lose control of the ball at the vital moment.
Demonstrating their willingness to partake in an open encounter, Swansea instantly counter-attacked at speed and should have opened the scoring, only for Pablo Hernandez to send his effort comfortably wide of David De Gea's far post.
As both sets of supporters continued to set a booming soundtrack, the party continued irrespective of events on the field. Chico Flores managed to deflect Chicharito's back-post header wide, while Evra and Scholes both directed half-hit efforts straight at Gerhard Tremmel from promising positions as United dictated play and sought a goal to crank the volume up still further.
Kagawa took up the baton himself around the half-hour mark, first being denied a fair shout for a penalty after tangling with Neil Taylor, then cutting infield and driving a left-footed effort high into the Scoreboard End.
As United's monopoly on possession grew, it appeared a mere matter of time before the deadlock was broken. Sure enough, shortly after arrowing a first-time volley over the bar, Chicharito pounced to supply the opening goal. Van Persie's curling free-kick from the right flank was poorly defended by the visitors, ricocheting off Ashley Williams and falling perfectly for United's number 14 to slide home a simple finish.