Rudy Fernández won the 2005 and 2007 Catalan Tournaments, the 2006 EuroChallenge championship, the 2008 Spanish King's Cup championship, and the 2008 Eurocup championship while playing with DKV Joventut of the Spanish ACB League. He also won numerous personal awards while playing with DKV Joventut, such as the 2004 Spanish King's Cup MVP, the 2006 EuroChallenge Final Four MVP, the Euroleague 2006-07 season's Rising Star award, the 2008 Spanish King's Cup MVP, the 2008 Eurocup Finals MVP, and the 2007 Catalan Tournament Final MVP.
He was also named the 2006 FIBA Europe Young Player of the Year. In July 2007, his contract with Joventut was extended through the year 2011, however his contract was bought out early in the year 2008 so that he could join the NBA. On his exit out of the club he paid tribute to his DKV coach, Aito Garcia Reneses, "All I know of basketball is thanks to Aito Garcia Reneses,” he said.