The season was also disrupted when the club was one of the two teams involved in the Sicilian derby of 2 February 2007 which led to riots and a police fatality, resulting in various safety restrictions being imposed on the league. Having dropped out of the UEFA Champions League qualification places, Guidolin was sacked on 23 April following a 4–3 home defeat to relegation-threatened Parma. After his assistant Renzo Gobbo failed to halt the club's slide, the sacking was revoked on 14 May after two further defeats. After finally finishing fifth and therefore qualifying for the 2007–08 UEFA Cup, Guidolin was sacked again, being replaced by Atalanta coach Stefano Colantuono.