Jurgen Klinsmann said Jordan Morris is going through a learning curve as he adjusts to playing at the professional level, but he remains in the plans of the senior national team.
Fernando Torres gave Atletico Madrid an early lead with a goal in the 25th minute, but he was sent off 10 minutes later with his second yellow card of the match.
Leicester has six remaining Premier League matches beginning with Sunderland on Sunday, followed by West Ham, Swansea City, Manchester United, Everton and Chelsea.
Mesut Ozil said that "looking at our season so far, we have to be honest and admit that we botched it ourselves" by not beating some of the "smaller teams" in the league.
Diego Costa's reluctance to leave the pitch, and reaction at the referee’s decision, has earned him a further ban, a £20,000 fine and a warning as to his future conduct.