The Football League have ruled in favour of Derby in the disagreement with Championship rivals QPR over ticket prices.
The London club wanted to increase prices by £10 for the game at Loftus Road on Saturday, despite County's claim that prices of £30 for adults and £20 for concessions had been agreed over the summer.
In a statement, John Vicars, Derby's vice president of operations, welcomed the ruling. He said: "Derby County are pleased with the Football League's decision."
He added: "We will now be working closely with QPR to sort out the swift distribution of tickets to our supporters.
"We therefore look forward to seeing plenty of Rams fans at Loftus Road this Saturday supporting the team."
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