Kaye Scholer has been hit with a legal malpractice suit by a former client that claims the New York law firm’s discovery mistakes forced it to enter into a $107 million antitrust settlement.

Chemical and plastics giant Celanese on Wednesday filed a 33-page complaint against Kaye Scholer in federal court in Dallas. The law firm had represented Celanese from 2002 to 2006 in multi-district litigation brought by Celanese customers charging price-fixing in the market for polyester fibers.