 He was called up to the Germany squad for the 2010 World Cup in South Africa by coach Löw, being the second player of Turkish extraction in the squad, along with Mesut Özil.Tasci made his World Cup debut as a substitute in Germany's third place match against Uruguay, coming on in the 91st minute for Özil.He struggled to touch the ball in his 125 seconds on the pitch, prompting VfB Stuttgart sporting director Jochen Schneider to say, "But for Serdar Tasci[,] the World Cup from a purely personal point of view was certainly not satisfactory."