The Brazil international has warned that the Russian giants can cause plenty of troubles for Jose Mourinho's men in the upcoming game at the Santiago Bernabeu
The Liga leaders were held to a 1-1 draw in Moscow some three weeks ago, and the Brazilian has warned that the Army Men have what it takes to trouble Los Blancos in the return.
"CSKA as a whole will be dangerous. They made it very difficult for us in Moscow. We will have to watch out because they can cause us problems," Kaka stated to the Spanish club's official website.
"These ties are always difficult and very exciting because you play one match at home and another on the road. It is very motivating to play in the Champions League.
"We will do our best to win against CSKA regardless of the result in the first leg. We always do that. The home advantage will be key. Our crowd, which always supports us, can really make a difference and we will showcase our creativity and play and intense game to win the tie."
Wednesday's second leg at the Santiago Bernabeu kicks off at 20.45CET.