San Lorenzo beat Arsenal, 4-2, at home on Sunday to win Argentina’s Clausura championship, its first title since 2001.
The win gave it a four-point lead over Boca Juniors with one game to play.
Striker Gaston Fernandez scored twice in the second half to put the game away. Defender Cristian Tula and striker Ezequiel Lavezzi scored earlier for San Lorenzo.
Boca Juniors won, 1-0, at Belgrano thanks to Bruno Marioni‘s goal. Boca Juniors meets Gremio of Brazil in the first leg of their Libertadores Cup final on Wednesday.