At 16 years and 18 days, Borussia Dortmund striker Youssoufa Moukoko became the youngest player in Champions League history on Tuesday when he came off the bench against Zenit Saint Petersburg. Moukoko, who made his European debut as a 58th-minute substitute in Russia, broke the previous record of Celestine Babayaro, who was 16 years and 87 days when he played for Anderlecht in November 1994. mw/lp