The Gunners dumped Milan out of the Champions League thanks to goals from Cesc Fabregas and Emmanuel Adebayor and Kaka said at the final whistle: "At the end of the season many players reach the end of their contracts and the club will decide what signings to make.
"Tomorrow and the day after will be the most difficult. The Champions League was our objective and now that is gone we must focus on at least trying to achieve fourth place.
"This team has done a great deal over the past few years for its fans and players. Unfortunately this season it went this way."
The Brazilian admitted: "Arsenal played very well in both legs and we lost against a team that played better than we did. When I got the ball and tried to run forward on the counter, myself, Pippo and Pato weren't sharp enough to do anything better.
"It is an unfortunate setback, but these defeats help you to mature."