Eliminated Serbia and Montenegro players are being threatened with fines if they fail to take their final World Cup game against Ivory Coast seriously.
Petkovic wants his team to "salvage some pride"
According to team spokesman Aleksandar Boskovic, "financial penalties" will be imposed on the players.
"The game against Ivory Coast is our absolute priority," he added.
Coach Ilija Petkovic said: "We will try to salvage some of our pride. We have to try and evade the humiliation that we have suffered here so far."
Holland and Argentina have already qualified from Group C, each gaining victories over Serbia and Montenegro and Ivory Coast.
Serbia were beaten 1-0 by the Dutch and then 6-0 by Argentina last Friday.