Complex sentence: On 21 October, Fábio was handed his Champions League debut in a 1--0 win over CSKA Moscow; he started the game but came off shortly before the end with an injury.
Split into simpler sentences: On 21 October, Fábio was handed his UEFA Champions League debut in a 1--0 win over CSKA Moscow. He started the match but came off shortly before the end with an injury.