The 2003 Torneo Descentralizado (known as the Copa Cable Mágico for sponsorship reasons) was the eighty-seventh season of top-flight Peruvian football.
Alianza Lima won its twentieth Primera División title after beating Sporting Cristal in the final playoff.
Juan Aurich and Coopsol Trujillo finished the 2002 season in 11th and 12th place, respectively, on the three-season average table and thus were relegated to their regional leagues.
But since Cienciano had played one match less and would have surpassed Unión Huaral had they won it, a preliminary playoff was held between them.
Had the Clausura Rounds 16 and 17 not been annulled, the team would have been third in the aggregate table, and could have claimed the remaining berth.