Saúl's header gives Atletico 1-0 lead over Leicester City.
Diego Simeone on his team's focus at the start of the season
Watch Diego Simeone's best moments.
Diego Simeone could be banned for the UCL final.
Simeone hits one of the officiating members.
United's latest defeat has increased pressure on Van Gaal.
Diego Simeone desire for energy from his squad.