The four major sports leagues and the NCAA filed a motion on Monday to block Gov. Chris Christie’s (R) move to legalize sports betting in New Jersey after filing a lawsuit last month.

The betting “threatens the integrity of these sports” the NCAA, NBA, NFL, NHL and MLB argued in their suit filed Aug. 7 in U.S. District Court in New Jersey.

Sports betting was originally approved by a 2012 law Christie signed, but it was challenged by a 1992 federal statute. Earlier this month, after a ruling by the 3rd Circuit Court of Appeals, Christie said casinos and racetracks could begin offering sports betting.

The leagues say betting creates suspicion that games could be fixed. The 2012 law sought to address concerns of athletes or coaches throwing games by prohibiting betting on any athletic event that takes place in New Jersey, or any event in which a New Jersey college participates, regardless of its location.

“The … authorization of sports gambling in New Jersey would irreparably harm amateur and professional sports by fostering suspicion that individual plays and final scores of games may have been influenced by factors other than honest athletic competition,” the complaint reads.