 Complete the following phrase:  He made his senior debut for the Reds under the stewardship of Rafael Benítez on 10 August 2004, coming on as a late substitute for Steve Fin in a UEFA Champions League qualifier against Austrian side Grazer AK, playing the last five minutes. He started in the return fixture at Anfield 14 days later, in what ended as a 10 defeat though Liverpool advanced with a 21 aggregate victory. He made his Premier League debut on 1 February, in a 21 win at Charlton Athletic. He also featured in the knockout stages of the UEFA Champions League, coming on as a substitute in the round of 16 home tie against Bayer Leverkusen. Liverpool went on to beat Milan in 