Kaka admits he's unsettled at AC Milan following Ronaldinho's arrival.
"Ronaldinho is settling in very well and is giving us a great hand, but there are tactical issues we need to understand," warned Kaka.
"Before his arrival we were accustomed to playing in a certain way and had learned the movements by heart.
"It was [Clarence] Seedorf and I behind a striker, who was almost always [Pippo] Inzaghi. With Ronaldinho turning up there have been some tactical modifications.
"Personally I had always started central and moved wide left as I approached the box, but now Ronaldinho is there and that limits me a little bit."