#11 Ronaldo's penalty for Manchester United to seal the title against Manchester City
They wouldn't know this goal had won the title for them until later when Chelsea failed to beat Arsenal in the London Derby. It marked Ronaldo's first Premier League title win and it was sealed from the spot when he stepped up after having been brought down in the box.
The lone goal was sufficient to carry them to victory and of course Edwin van der Sar's save from a penalty at the other end, but Ronaldo would make a creer of such moments. Committing defenders in the box and dispatching penalties expertly over the course of his career.
The importance of the win was seen in real-time but the fact that it would become a title sealing three points only became apparent later, adding to the lore of Ronaldo.