Passage: On 13 January 2006, English club Arsenal confirmed that the club had signed Diaby on a long-term contract for an undisclosed fee, later revealed to be £2 million. Prior to joining Arsenal, the player had reportedly turned down an offer to join Arsenal's London rivals Chelsea. Upon joining Arsenal, Diaby was given the number 2 shirt, which was left vacant since the retirement of Lee Dixon. He made his club debut on 21 January 2006 appearing as a substitute in a 1–0 defeat to Everton. Three days later, he made his first start in a 2–1 Football League Cup victory over Wigan. On 21 February, Diaby made his UEFA Champions League debut appearing as a substitute in the team's Round of 16 first leg victory over Spanish club Real Madrid. Two weeks later, Diaby assisted on a goal in Arsenal's 4–0 win over Fulham. After dealing with an injury in the month of March, he returned to play in April scoring his first goal for the club in a 5–0 victory over Aston Villa on April Fools' Day 2006. He was set up for the goal by fellow club newcomer Emmanuel Adebayor.On 1 May, Diaby suffered a severe ankle fracture after being on the receiving end of a tackle, described by the media as "horrendous", from Sunderland defender Dan Smith. After the match, Wenger described the tackle as "a bad kick and an unnecessary one" and also criticized his competitors' over-physicality, while interim Sunderland manager Kevin Ball defended Smith stating "Smith is not a malicious, dirty player and I think it's unfair to make that call on him and say he deliberately went to do it. Dan went for the ball, unfortunately Diaby was quicker than him". As a result of the injury, Diaby missed the 2006 UEFA Champions League Final, as well as the 2006 UEFA European Under-21 Football Championship. He underwent three surgeries to repair the injury and was told by doctors that the injury could possibly be career-ending. Following the surgeries, he underwent eight months of rehabilitation and made his return to first team action in the 2006–07 season in a League...

Question: who did they score five goals against?
Aston Villa