The 2012 Campeonato Nacional Apertura Petrobras was the Chilean football top tier’s 90th season. Universidad de Chile was the tournament's champion, after beating O'Higgins on penalties, in the finals. Regular season Standings Results Playoff stage Quarterfinals In the quarterfinals, the 1 seed play the 8 seed, the 2 seed play the 7 seed, the 3 seed play the 6 seed, and the 4 seed play the 5 seed. Semifinals In the semifinals, the highest seed play the lowest seed, and the second-highest seed play the second-lowest seed. Universidad de Chile won 4–2 on aggregate. 2–2 on aggregate. O'Higgins won on away goals rule. Finals 3–3 on aggregate. Universidad de Chile won on penalties. Top goalscorers External links ANFP 2012 Torneo Apertura at Soccerway Season regulations Primera División de Chile seasons Chile Prim