Ajax coach Frank de Boer feels for Real Madrid midfielder Kaka.

Kaka has failed to make a serious impression since joining Real from AC Milan almost three years ago.

"Kaká had his opportunities. It's a pity; he's one of the best players in the world and it's a shame that you don't see that on the pitch. But things happened as they did and in the end he plays when they let him. He would have played on my team," said De Boer ahead of their Champions League clash.