On 10 August 2005, Morientes scored in each half of a 3–1 away win against PFC CSKA Sofia in the first leg of the third qualifying round for the season's Champions League. His form in the league was inconsistent, but on 10 December he netted a five-minute brace in a 2–0 home defeat of Middlesbrough, their seventh in a row. On 21 March 2006, he scored in a 7–0 rout of Birmingham City in the quarter-finals of the FA Cup, finishing Steven Gerrard's cross three minutes after entering in place of Peter Crouch. Liverpool went on to win the tournament, and the player replaced Harry Kewell early in the second half of the final against West Ham United.