Kovac admits that his players found it difficult to cause problems for Brazil as they were defeated 3-1 on the opening night of the tournament, but he is hoping to be in full control against the Indomitable Lions.
"Against Cameroon it will be a completely different game," the 42-year-old told reporters. "It was difficult to attack Brazil - we had to look through counterattacks - but against Cameroon we will have greater ball possession and seek dominance.
"The first goal will be an advantage - it would be good to go in to half-time with a positive result. We know all about Cameroon, we analysed them like Brazil and will set our tactics accordingly."
Luka Modric is expected to shake off a foot injury to provide Croatia with a boost in midfield.