 Complete the following phrase:  The previous season was a transitional period for Arsenal. The club transferred a number of first-team players such as defenders Sol Campbell and Lauren to Portsmouth and winger Robert Pires to Spanish club Villarreal. After lengthy negotiations, Ashley Cole moved to Chelsea on the final day of the summer transfer window, in exchange for 5 million and defender William Gallas. Arsenal played their home games at the newly constructed Emirates Stadium and drew their first game against Aston Villa. After a defeat by Bolton Wanderers, manager Arsène Wenger admitted that his team were unlikely to make a serious challenge for the Premier League. Despite being a young and inexperienced team, however, Arsenal reached the 