He was selected as a referee for the 2010 FIFA World Cup.[4] Lannoy refereed the group stage match between The Netherlands and Denmark and the match between Brazil and Ivory Coast. He was also picked as one referee of the referees for UEFA Euro 2012.[5] On 28 June 2012, Lannoy refereed the Euro 2012 semifinal between Italy and Germany, won 2–1 by Italy. He booked Mario Balotelli, in accordance with UEFA guidelines, for taking his shirt off after a goal celebration.
Controversy
Stéphane Lannoy came into controversy for his refereeing in the match between Brazil and Ivory Coast of the 2010 FIFA World Cup when he awarded Brazilian player Kaká a second yellow card turned into red card in the 88th minute for a violent contact with Ivoirian player Abdul Kader Keïta. However, camera evidence showed that Abdul Kader Keïta was running into Kaká and dived in the ground, covering his face as if he was injured, after the contact was made.[6]