 Complete the following phrase:  Courtois made his debut for Atlético in a 40 UEFA Europa League victory over Vitória de Guimarães on 25 August, and three days later kept a clean sheet on his La Liga debut, a goalless draw against Osasuna at the Vicente Calderón Stadium. Courtois became first-choice goalkeeper over Sergio Asenjo, keeping four clean sheets in his first six La Liga games. On 26 November 2011, Courtois received his first red card of his professional career after fouling Real Madrids Karim Benzema for a penalty in the Madrid derby. Cristiano Ronaldo put the penalty past substitute goalkeeper Asenjo as Atlético lost 14. Atlético reached the 