BUENOS AIRES – Botafogo won the Copa Libertadores for the first time in their history with a 3-1 victory over fellow Brazilians Atletico Mineiro on Saturday.Botafogo played almost the entire match with ten men after Gregore was sent off in the first minute but they showed impressive spirit and resilience to secure victory at River Plate’s Monumental Stadium in Buenos Aires.It is the sixth straight season that a Brazilian club has won the Libertadores, the top competition for South American clubs.The 120-year-old Botafogo, the Rio club who have twice won the Brazilian championship, have a…