Ricardo Izecson dos Santos Leite, commonly known as Kaká or Ricardo Kaká, is a Brazilian former professional footballer who played as an attacking midfielder. Kaká was known for his explosive pace, dribbling, passing, and goalscoring, and is considered one of the greatest players of all time. With success for both club and country, he is one of the ten players to win the FIFA World Cup, the UEFA Champions League, and the Ballon d'Or.
In 2001, at age 18, Kaká made his professional debut at Brazilian club São Paulo. He later joined Italian club AC Milan in 2003. Kaká helped Milan win the Serie A title in his first season. Milan finished runner-up in the 2004–05 UEFA Champions League with Kaká being the top assist provider of the tournament and being named the UEFA Club Midfielder of the Year. He led Milan to win the 2006–07 UEFA Champions League and was the tournament's top goalscorer. His performances saw him win the FIFA World Player of the Year, the 2007 Ballon d'Or, and the UEFA Club Footballer of the Year. After six years with Milan, Kaká joined Real Madrid in 2009 for a transfer fee of €67 million, which was the second highest transfer fee at the time.