Chelsea threw away a 1-0 goal lead with a poor second-half performance against Flamengo on Friday night.
Pedro Neto pounced on several mistakes to put the Blues into an early lead on 13 minutes, sliding the ball past keeper Agustin Rossi.
All the good work was undone just after the hour mark with two quick-fire goals and the red card for Nicolas Jackson, who had only been on the pitch for a matter of minutes.
It is a disappointing setback for Enzo Maresca and his team, who will need to get something from their last group game against ES Tunis.
Press the next page as we give our Chelsea player ratings for the 3-1 defeat at Lincoln Financial Field.