Madrid - The Internet social network Twitter got Brazilian playmaker Kaka into trouble Thursday, as public opinion was made aware of a message in which Real Madrid coach Manuel Pellegrini was defined as a "cowardly coach.""A cowardly coach always substitutes a player to try to divert attention from his own powerlessness," said the original message posted in Kaka"s Twitter page.

The talented midfielder had just been replaced with Raul in the round of 16 match that sealed Real Madrid"s elimination from the Champions League late Wednesday at the hands of Olympique Lyon.

The tweet was traced back to Kaka"s wife Carolina Celico, who usually feeds the player"s page. But Celico denied Thursday, also on Twitter, any involvement in the post.

"That tweet that they are talking about was never on my iPhone. I have witnesses. I never comment on something that is still going on," she stressed.

Diogo Kotscho, Kaka"s media manager, then claimed responsibility for the message. Kotscho promised never again to write about football on Twitter.

"From now on I will only comment on cooking recipes," he said.