(NEWSER) – It looks like Donald Sterling isn't going down without a fight. The embattled LA Clippers owner has hired a prominent antitrust lawyer and informed the NBA that he has no intention of paying a $2.5 million fine imposed for making racist remarks, sources tell Sports Illustrated andUSA Today. "We reject your demand for payment," the lawyer's letter informs the league per the sources; it claims "no punishment is warranted" because Sterling has done nothing wrong and says his "due process rights" have been violated. (SI notes that latter claim is somewhat backed up by the NBA's quickie 4-day investigation, but that as a private association it has no obligation to provide due-process rights.) The deadline for paying the fine actually came and went earlier this week.