On what date did Universitario win the Torneo Apertura round after 2003 at Estadio Alejandro Villanueva?
CREATE TABLE "torneo_descentralizado_1966_present" (
  "season" real,
  "date" text,
  "score" text,
  "winner" text,
  "venue" text,
  "competition_round" text
);
SELECT "date" FROM "torneo_descentralizado_1966_present" WHERE "venue"='estadio alejandro villanueva' AND "season">2003 AND "competition_round"='torneo apertura' AND "winner"='universitario';