Table schema:
CREATE TABLE table_name_45 (date VARCHAR, winner VARCHAR, competition_round VARCHAR, venue VARCHAR, season VARCHAR)

Question: On what date did Universitario win the Torneo Apertura round after 2003 at Estadio Alejandro Villanueva?
SQL: SELECT date FROM table_name_45 WHERE venue = "estadio alejandro villanueva" AND season > 2003 AND competition_round = "torneo apertura" AND winner = "universitario"