 Complete the following phrase:  Although Chelseas title challenge was already realistically over when he arrived, Hiddink led Chelsea to their fifth Champions League semi-final, knocking out Juventus and Liverpool before they were eliminated by Barcelona on away goals in the semi-final, with the performance of second leg referee Tom Henning Øvrebø proving particularly controversial. Despite the Champions League exit, the season culminated in a trip to Wembley Stadium, with Chelseas final game of 200809 contested against Everton in the 