When 17-year-old Federico became an overnight star

United had lost their previous two games and were two points behind leaders Liverpool, although with two games in hand, when they hosted Aston Villa on April 5, 2009. They were trailing 2-1 when Sir Alex Ferguson threw on Macheda for his debut. Ronaldo equalised and after 90 minutes, the Italian turned sharply in the box and sent a fantastic curled finish past Brad Friedel to send United back to the top of the table. They went on to win the title by four points.