Flamengo became champions of South America on Saturday as two goals in the last five minutes from Gabriel Barbosa snatched a 2-1 win over River Plate in the Copa Libertadores final.

The one-off match, relocated to Estadio Monumental in Lima due to civil unrest in Santiago, looked set to be settled by a first-half strike from Rafael Santos Borre.

Marcelo Gallardo's men, bidding to become the first team to win back-to-back titles since Boca Juniors in 2001, had the game largely under control until Gabriel Barbosa levelled in the 89th minute.

The striker then smashed home on the half-volley in the second minute of injury time before being sent off along with Exequiel Palacios in one of the most dramatic finales to the competition's recent history.