Atletico Madrid coach Diego Simeone was calm after defeat to Barcelona on Sunday.
Joao Felix, on-loan from Atletico for the season, struck for the 1-0 win.
Felix had been criticised by several Atletico players going into the game, but appeared to have the last laugh.
Simeone later said: I leave here with a positive image of the second half.
"With peace of mind, knowing the team will always responds when it takes a hit. The season is long and we will continue to fight."