SELECT date FROM table_name_45 WHERE venue = "estadio alejandro villanueva" AND season > 2003 AND competition_round = "torneo apertura" AND winner = "universitario"
CREATE TABLE table_name_45 (date VARCHAR, winner VARCHAR, competition_round VARCHAR, venue VARCHAR, season VARCHAR)
Universitario ชนะ Torneo Apertura รอบหลังปี 2003 ที่ Estadio Alejandro Villanueva ในวันที่ใด
On what date did Universitario win the Torneo Apertura round after 2003 at Estadio Alejandro Villanueva?