Albion failed to avoid the drop in the 2005–06 season, despite home wins over Everton, Arsenal and Spurs. They were relegated to The Championship following Portsmouth's 2–1 victory over Wigan Athletic. Robson left the club "by mutual consent" in September 2006 and by was replaced the following month by Tony Mowbray. In Mowbray's first game in charge, The Baggies beat Wolves 3–0, their biggest win over their rivals for over 25 years. Albion briefly led the Championship on goal difference in February, but indifferent form over the remainder of the season meant that automatic promotion was out of reach. A 7–0 victory over Barnsley on the final day of the league season secured a place in the play-offs, where they met Wolves again in the semi-finals. Albion won the first leg 3–2 at Molineux, while in the second leg at The Hawthorns Albion won again, 1–0. This booked them a place in the final at Wembley Stadium against Derby County, but Albion lost 1–0.