"They all - Sven, Scolari, Mourinho - they are great coaches, great managers," he said.
However, he did admit that he had told Eriksson he was unhappy with City's dip in form which saw them fall out of contention for European football.
"During the season, we may complain for improvement but that's normal for every club," said the former Thai prime minister.
"But we will discuss at the end of the season what needs to be changed, what needs to be added to the success of the club."
