This season, Adelaide United passed the one millionth spectator milestone of total crowds since the inception of the A-League. They reached this achievement when their 7,052nd fan passed through the gate, for the Round 3 match against Wellington. Adelaide United are only the third A-League club to do so thus far, the other two being Melbourne Victory and Sydney FC.[3]
The round 18 A-League match against Sydney FC at the Adelaide Oval saw $23,002 donated to the Starlight Foundation as $1 from every ticket sold for the match went to the charity.[4]
By the end of round 27, Adelaide had drawn level for first, equalling Melbourne's 38 points on the ladder, having needed to win 2–0 against the Central Coast Mariners away to win the premiership and only securing a 1–0 win. Adelaide was pushed down to second because of goal difference. The Reds, along with Melbourne, the Queensland Roar and Central Coast, proceeded to the finals where they lost 1–0 against Melbourne Victory in the grand final at Etihad Stadium, Melbourne.
An early highlight for the season was Adelaide's run to the final of the AFC Champions League against Gamba Osaka.[5][6] Because of this performance, Adelaide participated in the 2008 FIFA Club World Cup. They played in the play-off round against Waitakere United on 11 December, defeating them 2–1.[7][8] The Reds' next game was played against AFC Champions League rivals, Gamba Osaka, in the quarterfinal round on 14 December in Toyota, Japan. This match, despite Adelaide's grown skill since their first meeting with ACL champions, was won by Gamba Osaka 0–1.[9][10] Adelaide's last appearance in the Club World Cup was against Al Ahly, from Egypt, to determine the fifth-placed club. The match was played on 18 December, and Adelaide defeated Al-Ahly 0–1.[11][12]
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
1 – does not include own goal(s)
* – player(s) who competed in the ACL but not in the 2008–09 A-League season or the CWC
** – player(s) who competed in the CWC but not in the 2008–09 A-League season or the ACL