Eto'o left Barcelona two years ago due to an alleged row with Guardiola.
"Pep is a great Coach. We had some disputes, as happens in every side, but when I left Barcelona I had no remorse for what I did, on the field or off it.
"In fact, I am still in contact with Guardiola and Mourinho. With Benitez? No.
"I am richer not because of money, but because I made my dream come true," said the Cameroon striker.
"God wanted me to do this and I won a great deal. Few black children have the good fortune I've had in my life, but we are fighting so that many more can have these opportunities.
"My foundation and that of Didier Drogba are working towards this aim."