Striker Dario Cvitanich scored 12 minutes from time as Boca Juniors celebrated the Argentina League title they clinched last weekend with a 1-0 win over 10-man All Boys at the Bombonera on Sunday.Boca finished the Apertura championship unbeaten with 12 wins and seven draws, scoring 25 goals and conceding only six.They extended their unbeaten run to 29 matches, which includes the final 10 of last season.Cvitanich took his goal tally to five as Boca’s leading scorer, six behind the championship’s leading marksman Ruben Ramirez.All Boys had their Uruguayan midfielder Juan Pablo Rodriguez sent off four minutes into the second half for reacting badly to a booking.