Arsenal boss Arsene Wenger is critical of Premier League clubs who are spending big money and running up debts.
Half of clubs in the English top flight are now owned by foreign investors who are dipping into their bank accounts to fund new transfers.
The Frenchman, who is regarded as a manager who favours scouting young talent rather than buying already established players, has slammed big-spending clubs as 'half-cheating'.
"Professional football is about winning and balancing the budget," he said in the Daily Express.
"That's the basic rule, one I fought for. All the rest is half-cheating.
"For every club it has to be the same. I always pleaded for financial fair play.
"The clubs belong to the fans. That's all I feel my responsibility is, to keep the club in good financial condition."
Chelsea announced on Wednesday that they had significantly improved their debt after owner Roman Abramovich converted his loans into equity.
When asked about the announcement, Wenger added: "Well, you know we are in a period of magicians."