The 2005–06 UEFA Champions League was the 51st season of UEFA's premier European club football tournament, the UEFA Champions League and the 14th since it was rebranded from the European Cup in 1992. 74 teams from 50 football associations took part, starting with the first qualifying round played on 12 July 2005.
The tournament ended with a final between Arsenal and Barcelona at Stade de France, Paris, on 17 May 2006. Barcelona won 2–1 with Juliano Belletti scoring a late winner. Arsenal had taken the lead through a Sol Campbell header in the 37th minute, despite Jens Lehmann being sent off in the 18th minute. Samuel Eto'o brought Barcelona back on level terms in the 76th minute before Belletti scored the winner five minutes later.
The defending champions Liverpool were eliminated by Benfica in the first knockout round.
Title-holders Liverpool, as well as 23 league champions from countries ranked 27 or lower on the 2004 UEFA ranking, were drawn against each other and played two matches, home and away, with the winners advancing to the second qualifying round. Though they finished fifth in the Premier League in 2004–05 (usually only four English teams are allowed in), Liverpool were granted a special exemption by UEFA as the holders, whereby they were placed into the first qualification round.
The 12 winners from the first qualifying round, 10 champions from countries ranked 17–26, and six second–placed teams from countries ranked 10–15 were drawn against each other and played two matches, home and away, with the winners advancing to the third qualifying round.
The 14 winners from the second qualifying round, six champions from countries ranked 11–16, three second–placed teams from countries ranked 7–9, six third–placed teams from countries ranked 1–6, and three fourth–placed teams from countries ranked 1–3 were drawn to play 2 matches, home and away, with the winners advancing to the group stage and losers advancing to the first round of the UEFA Cup.
Location of teams of the 2005–06 UEFA Champions League group stage. Brown: Group A; Red: Group B; Orange: Group C; Yellow: Group D; Green: Group E; Blue: Group F; Purple: Group G; Pink: Group H.
16 winners from the third qualifying round, 10 champions from countries ranked 1–10, and 6 second-placed teams from countries ranked 1–6 were drawn into 8 groups of 4 teams each. Normally two teams from the same association cannot be drawn in the same group. However because of the abnormal qualification of Liverpool as title holders despite not having finished in the top four of the English league, Liverpool were not given "country protection" in the draw for the group stages. In the event they were drawn in the same group as Chelsea.
The top 2 teams in each group advanced to the Champions League knock-out stage, while the third-placed teams advanced to the Round of 32 in the UEFA Cup.
Tiebreakers are applied in the following order:[1]
Points earned in head-to-head matches between the tied teams.
Total goals scored in head-to-head matches between the tied teams.
Away goals scored in head-to-head matches between the tied teams.
Barcelona (2nd title)
Arsenal
Andriy Shevchenko
Dinamo Tbilisi
Artmedia
FH
Skonto
Anorthosis Famagusta
Sheriff Tiraspol
FBK Kaunas
Total Network Solutions
Pyunik
KF Tirana
Shelbourne
Zrinjski Mostar
Brøndby
Thun
Trabzonspor
Celtic
CSKA Sofia
Maccabi Haifa
Steaua București
Lokomotiv Moscow
Rapid Wien
Hajduk Split
Panathinaikos
Monaco
Udinese
Werder Bremen
Ajax
Slavia Prague
Brown: Group A; 
Red: Group B; 
Orange: Group C; 
Yellow: Group D;
Green: Group E; 
Blue: Group F; 
Purple: Group G; 
Pink: Group H.
Ronaldinho
Samuel Eto'o
Julio Cruz
