1. Iker Casillas had a chastening start to life in the UEFA Champions League, conceding three goals on his competition debut, a draw at Olympiacos in September 1999. Indeed, after six outings he had picked the ball out of his net no fewer than 15 times. However, all’s well that ends well – by the end of the season he was a UEFA Champions League winner, the youngest keeper to play in a final.
2. Gianluigi Buffon was 19 when he made his competition bow for Parma in 1997/98 (the only one of his 13 UEFA Champions League campaigns that have not come with Juventus).