 Complete the following phrase:  In August 2007, he received an injury to his knee cartilage and it was expected that he would be unavailable for up to four weeks, but he contracted an infection during an operation on the injured knee that delayed his return for a much longer period. He made his return to first team football in October, and went on to score a headed goal in the 21 League Cup defeat by Liverpool at Anfield on 31 October. The 200708 season turned into a disappointment for Purse as he was forced out of the side by Bluebirds fan favourite Roger Johnson. He also scored several own goals, including a spectacular volleyed pass back that proved too powerful for Cardiff goalkeeper Peter Enckelman. He was also labelled a muppet by Burnley forward Andrew Cole, after Purse was sent off for what was deemed a dangerous tackle against Cole, although Cardiff manager Dave Jones defended the player and the ban was later overturned. Purse did not feature in Citys FA Cup run to 