made his UEFA Champions League debut in the first leg of the team's 3–2 knockout round victory over Spanish club Celta de Vigo. Clichy finished the campaign appearing in seven more matches. On 9 May 2004, he appeared as a substitute in Arsenal's 1–0 league win over Fulham. A week later, Clichy appeared on the bench in the team's final league match of the season; a 2–1 win over Leicester City. The victory assured Arsenal an undefeated league season, which resulted in the club becoming the second first division team in English football history to finish a league season unbeaten. As a result of the title, at 18 years and 10 months, Clichy became the youngest player to win a Premier League medal. Clichy remained second-choice to Cole for the 2004–05 season. Wenger did install the young defender as first-choice for FA Cup matches. Clichy appeared as a starter for every round until Arsenal reached the semi-finals when he was replaced by Cole. The club ultimately won the competition defeating Manchester United 5–4 on penalties to give Clichy his first domestic cup honour. In the Premier League, Clichy appeared in 15 matches, seven as a starter. In the UEFA Champions League, he only made two appearances; a 5–1 group stage victory over Norwegian club Rosenborg and a 3–1 knockout round defeat to German outfit Bayern Munich. Clichy's season ultimately ended prematurely in April due to a recurring foot injury. In the 2005–06 season, Clichy was handed an opportunity to earn a regular place in the starting line-up after Cole suffered a fractured foot in October 2005. The injury seemed to signify that Clichy would earn some valuable first-team action during Cole's time out, however, after appearing six straight matches as a starter, Clichy suffered a similar injury in November, which ruled him out for four months. He returned to the team on 25 April 2006 in a Champions League semi-final tie against Spanish outfit Villarreal coming on as a substitute for the injured Mathieu Flamini. In the late stages of the match, Clichy was adjudged to have committed a foul in the box on striker José Mari, which resulted in a penalty taken by Juan Román Riquelme, which was saved by Jens Lehmann. Had Riquelme converted, the game would have gone to extra time. After appearing in a 3–0 win over Sunderland in the league the following week, Clichy suffered