The 2003-05 period marked the electrifying arrival of Cristiano Ronaldo as a teenage sensation at Old Trafford, defined by his dazzling footwork and legendary debut against Bolton Wanderers. This era saw the young winger blossom into a world-class talent, famously netting the opening goal in the 2004 FA Cup final victory and delivering a standout brace against Arsenal that showcased the flair and bravery of United's new iconic number seven.