Messi began playing football at a young age and his potential was quickly identified by Barcelona. He left
Rosario-based
Newell's Old Boys's youth team in 2000 and moved with his family to Europe, as Barcelona offered treatment for his
growth hormone deficiency. Making his debut in the
2004–05 season, he broke his team record for the youngest footballer to score a league goal. Major honours soon followed as Barcelona won La Liga in Messi's debut season, and won
a double of the league and
Champions League in 2006. His breakthrough season was in the
2006–07 season; he became a
first teamregular, scoring a
hat-trick in
El Clásico and finishing with 14 goals in 26 league games. Messi then had the most successful season of his playing career, the
2008–09 season, in which he scored 38 goals to play an integral part in a
treble-winning campaign. This record breaking season was then eclipsed in the following
2009–10 campaign, where Messi scored 47 goals in all competitions, equalling
Ronaldo's record total for Barcelona. He surpassed this record in the
2010–11 season.