2003 Davis Cup World Group

The World Group was the highest level of Davis Cup competition in 2003. The first-round losers went into the Davis Cup World Group playoffs, and the winners progress to the quarterfinals. The quarterfinalists were guaranteed a World Group spot for 2004.

Anthem incident
Himno de Riego, an obsolete anthem of Spain, was played in the Australia vs Spain match. Juan Antonio Gomez Angulo, Spain's sport minister, left the stadium in protest and returned after the organizer apologized. For similar incidents, see list of wrong anthems incidents.