Paul Mullin's injury is a disaster! Six things we learned as Wrexham take down young Man Utd side 3-1 after star striker left with punctured lung

It may only have been the youngsters, but Wrexham's players will always remember the day they outclassed Manchester United. The Red Dragons overpowered the Red Devils in San Diego, leaving with a well deserved 3-1 win.

However, the game threatened to be overshadowed by the sight of Paul Mullin writhing in agony on the floor after being brutally knocked over by United goalkeeper Nathan Bishop. Mullin eventually got up and was able to walk off the pitch, with fans chanting his name and booing Bishop for his over-the-top challenge. After the game, coach Phil Parkinson revealed Mullin had suffered a punctured lung, confirming fears that he would miss the start of the League Two season.

Wrexham barely missed Mullin for the rest of the game, though, as Elliot Lee and Aaron Hayden struck twice in the first half after United failed to deal with the League Two side's crosses into the box.

United, who were fielding their Under-21s side with the exception of veteran Jonny Evans, pulled a goal back before half-time through Spanish teenager Marc Jurado, but were then reduced to 10 men early in the second half when captain Dan Gore was shown a straight red card for a studs-up challenge on Andy Cannon.

Wrexham changed their entire outfield line up for the second half, but their substitutes made the most of their numerical advantage as Sam Dalby made sure of the victory.

GOAL looks at what we learned during the clash at the Snapdragon Stadium...