English giants Manchester United became the third side to reach the knockout stage of the Champions League this season after a come from behind 3-1 win over Portuguese opponents Braga. All the United goals came in the second-half through substitute Robin van Persie, a penalty from Wayne Rooney and Mexican star Javier Hernandez after Alan had given the hosts the lead early in the second-half from the penalty spot. United join 2004 champions Porto and debutants Malaga of Spain - who both qualified on Tuesday - in the last 16.