Belgian winger Carrasco broke the deadlock at the end of the first half, pulling off a classy backheel to knock the ball through the legs of Ter Stegen and keep his composure in front of goal after the German had charged out of his area.
"We know it will be hard, but we believe in ourselves".
"A team like Barca can not afford to concede a goal like that", said the Dutchman. "It's always tough to create many chances against Atletico, but when you lose the ball against them you have to do better than that".
La Liga games before Atletico coach Diego Simeone's first win over Barca.
The Argentinian had tasted success over Barca - in the Champions League in 2014 and 2016 and last season's Spanish Super Cup - but had never taken three points off the Catalans since taking charge of Atletico in 2011.
"I'm not anxious about our position in the table or the league title right now, we just need to focus on winning a series of games, that's what's most important right now", Koeman said.
Barcelona manager Ronald Koeman handed Lionel Messi, Frenkie de Jong and Miralem Pjanic extra rest after they returned from the worldwide break, with the trio given permission to miss Thursday's training session.
Pique was hurt during a collision with Angel Correa and was in distress as he departed.
"We need everyone. Felipe, who played much more continuously last season; Renan Lodi, who will surely be important; [Geoffrey] Kondogbia enters little by little; Saul [Niguez] is finding his best form; [Angel] Correa is showing extraordinary growth, not to mention Joao Felix or [Diego] Costa's enthusiasm when he came on".
"Today we were able to win but it absolutely doesn't change anything", said Simeone.
Another disappointing day for Barca was soured further by the sight of Pique hobbling off in tears with what the club said was a "sprained right knee".
Speaking to reporters, Vice President Hamilton Mourão lamented the incident at Carrefour, but denied it reflected racism. The two guards, one of whom was an off-duty police officer, were arrested and are being investigated for homicide.
Cousins was with the Los Angeles Lakers last season but did not see the court after suffering a torn ACL in pre-season. In 565 games with the Pelicans, Kings and Warriors, Cousins has averaged 21.2 points, 10.9 rebounds and 3.2 assists.
Sur le circuit Bugatti, théâtre de son GP national, Fabio Quartararo s'est fait un devoir de signer le meilleur temps de la Q2. Mais un atout supplémentaire pour Zarco, et surtout Quartararo dans sa quête d'un 4e Grand Prix cette saison.
The Taoiseach said Cabinet had not yet decided whether pubs and restaurants would be permitted to reopen fully ahead of Christmas. The total number of cases in the six counties has now surpassed the 50,000 mark while the death toll there stands at 936.
Chelsea forward Christian Pulisic has recovered from a hamstring injury and will be ready for Sunday's Premier League clash against leaders Tottenham Hotspur , said manager Frank Lampard , but will not travel to France for Tuesday's Champions match with Rennes .
Ole on Dean: He's not put a foot wrong
Manchester United manager Ole Gunnar Solskjaer has opened up on the reasons for Anthony Martial's poor start to the season. Every season is a challenge and you can not rest on your laurels at Man United. "We want Anthony to kick on".
Reims: Dia, le challenge sportif avant tout
Si tu as l'argent mais que tu n'es pas bien sur le terrain... "Mais si le sportif est bon, le reste suivra". Il faut un objectif clair et précis, un projet sportif qui soit en corrélation avec mes ambitions.