leandro marin headed the argentinian giants into the lead in the final minute but a lengthy delay in the second half meant there was a significant amount of injury time , with jonatan calleri sealing all three points in the 11th minute of time added on .
victory over their chilean opponents ensured boca finish as the highest seeds of the competition - with no other teams winning all of their group games - while no second placed team can finish on less points than river .