By the end of the 2009/10 season, Arsenal had already participated in the Champions League of 14 season. Since the 98/99 season, they have participated in the Champions League in 12 season. Looking at Europe, there are only four teams that can do this.
7 1/72 8 was eliminated by Ajax.
The former 9 1/92 16 was eliminated by benfica.
The 98/99 top 32 group match failed to qualify.
The 99/00 Top 32 group match failed to qualify.
00/0 1 8 was eliminated by Valencia.
0 1/02 16 failed to qualify for the second round of the group stage.
02/03 Top 16 failed to advance to the second round of group match.
03/04 The quarter-finals were eliminated by Chelsea.
04/05 Top 16 was eliminated by Bayern.
05/06 runner-up 1-2 narrowly defeated Barcelona.
06/07 16 was eliminated by Eindhoven.
07/08 Top 8 was eliminated by Liverpool.
The top four were eliminated by Manchester United in 2008/09.