Hearts and Partick insist their dispute is with the SPFL but say the three promoted clubs risk creating further division by asking other teams to fund their legal bills.
Scottish Premiership clubs are confident authorities will grant them special dispensation to play friendlies this weekend after the government’s latest lockdown update.
Scottish Premiership clubs hope to be given the go-ahead on Thursday to start playing pre-season friendlies.
Hearts and Partick Thistle's case to have their relegations overturned will go to arbitration by the Scottish FA.
Neil Doncaster and John Nelms could be cross-examined if Hearts and Partick Thistle's legal battle against relegation is heard in the Court of Session.
The judge presiding over Hearts and Partick Thistle's battle to avoid relegation is considering motions to terminate or suspend the case so it can go to arbitration.