The midfielder has revealed that he is happy to have put his struggles at the Santiago Bernabeu behind him and is now hoping to reach the milestone against Ajax
The Brazilian left the Rossoneri for Los Blancos for a world-record €70 million [£56m] in 2009 but struggled to reproduce his best form at the Santiago Bernabeu through a combination of injury and loss of confidence.
However, he is thriving again having returned to the Giuseppe Meazza on a free transfer this summer and, having taken his goals tally for Milan to 99 in their 3-1 win over Catania earlier this month, is eager to add to rack up his century in a game that Massimiliano Allegri's men need only a point from to progress to the last 16.
"I hope to score my 100th goal as soon as possible and it would be great to do so against Ajax on Wednesday," Kaka told reporters.
"The Milan shirt is like a second skin to me. I used to dream of wearing this shirt and I hope to continue doing so for many years.
"In Madrid I had a nice experience, but it was difficult as well. I’ve grown a lot professionally but I needed the warmth and faith of the Milan fans. I missed the Milanello atmosphere, the history of the club."