The 2003–04 Euroleague was the fourth season of the professional basketball competition for elite clubs throughout Europe, organised by Euroleague Basketball Company, and it was the 47th season of the premier competition for European men's clubs overall. The 2003–04 season featured 24 competing teams from 13 countries. The final of the competition was held in Nokia Arena, Tel Aviv, Israel, with hosts Maccabi Elite Tel Aviv, defeating Skipper Bologna, by a score of 118-74.

Arvydas Romas Sabonis is a Lithuanian former professional basketball player and businessman. Recognized as one of the best European players of all time and one of the best big-man passers in the history of the game, he won the Euroscar six times and the Mr. Europa Award twice. He played in a variety of leagues, including the Spanish ACB League, and spent seven seasons in the National Basketball Association (NBA). Playing the center position, Sabonis won a gold medal at the 1988 Summer Olympics, in South Korea, for the Soviet Union, and later earned bronze medals at the 1992 Olympic Games and 1996 Olympic Games representing Lithuania. He retired from professional basketball in 2005. Sabonis was selected by the Portland Trail Blazers in the first round of the 1986 NBA draft, but he did not play his first NBA game until 1995, at the age of 30.