return to the UEFA Champions League. Being league champions, AZ qualified for the Champions League for only the second time. It was drawn into a group alongside Arsenal FC, Standard Liège and Olympiacos but only took four points from six matches and finished bottom of their group. 2009–2014: Advocaat–Verbeek years For the 2009–10 season, Ronald Koeman succeeded Louis van Gaal, who had departed to manage Bayern Munich after leading AZ to the championship. Koeman was officially hired on 17 May 2009, but on 5 December, AZ announced he was no longer in charge of the club after losing 7 of his first 16 matches. Former Rangers and Zenit Saint Petersburg manager Dick Advocaat took over for the remainder of the season. Under Advocaat, AZ achieved solid results and secured European football for the next season. For the 2010–11 season, AZ appointed Gertjan Verbeek as its new manager. They finished the 2010–11 Eredivisie in fourth place, thus securing Europa League football for the next season, while in the KNVB Cup, AZ reached the last eight, where they were beaten by rivals Ajax by a 1–0 scoreline. AZ also finished third in their Europa League group, thus failing to qualifying for the competition's knockout round. In the 2011–12 season, AZ finished fourth in the Eredivisie, though performed significantly better in cup competitions, reaching the semi-finals in the KNVB Cup (losing to Heracles after extra time) and the quarter-finals in the Europa League. In the latter, the club ultimately lost to Valencia after having defeated Udinese, Anderlecht, Malmö FF, Austria Wien, Metalist Kharkiv, Aalesund and Baumit Jablonec to reach that stage. On 21 December 2011, during the quarter-finals of the 2011–12 KNVB Cup, a 19-year-old Ajax fan invaded the Amsterdam Arena pitch in the 36th minute with Ajax winning 1–0, attacking AZ goalkeeper Esteban Alvarado. The fan slipped and Alvarado kicked the fan twice, prompting the referee to issue the goalkeeper a red card. Following this, AZ manager Gertjan Verbeek ordered his players to leave the pitch for the dressing room in protest. The match was later played on 19 January 2012, with Alvarado's red card rescinded; AZ won 3–2. The 2012–13 season started in the Europa League with a qualifying play-off round against Guus Hiddink's Anzhi Makhachkala. AZ was hammered 6–0 on aggregate. Disappointingly, AZ finished tenth in the 2012–13 Eredivisie, although the club won the 2012–13 KNVB Cup after defeating PSV