The CBF's website said on Wednesday that Emerson and Kaka both complained of pain in the right knee and that Lucio had suffered a knock on his right thigh.
It did not give any further details on the three or whether there was any risk of their missing Saturday's quarter-final against France [ Images ].
Emerson was replaced by Gilberto Silva [ Images ] at halftime in Tuesday's game while Kaka went off in the 83rd minute. Lucio played on until the end.
It added that forward Robinho [ Images ], who was ruled out of the Ghana game because of a problem with his right thigh, is undergoing intensive treatment.
Brazil [ Images ] are hoping that Robinho would be fit for Saturday.