Eddie Howe quit suddenly Newcastle United after a 4-1 loss to Bristol City, Sky Sports News said.
Sky aired his last interview publicly.
He openly talked about the Bruno Guimaraes signing before walking out right after.
Former player Jay Bothroyd warned strongly the club could face threat of relegation without Howe.
Sky Sports will nationwide broadcast the national Scottish Premiership opener on Saturday.
Dundee United face Rangers at Tannadice.
Manager Jim Goodwin firmly said he wants to make an impact there.
Dundee United coach Derek McInnes stated two United players are absent and several are uncertain.
Rangers anticipate Thelo Aasgaard and Cammy Devlin to be available for the match.