Hans-Jörg Butt and Sinan Bolat are among the very few goalkeepers to have scored in Champions League history. Butt scored for Bayer Leverkusen in 2001 from a penalty, while Bolat scored for Standard Liège in 2009, also from a penalty. Goalkeeper goals are exceptionally rare in top-level European football. The question asks specifically about Champions League, not all competitions.