Manchester United's prospective takeover has seen several parties linked with the club, with reports this week claiming that Newcastle's owners could opt to sell the Magpies in order to purchase the Reds.
The Glazer family sent announced last month that they were "exploring strategic opportunities" for United, which could include selling the club.
Simon Chadwick, professor of sport and geopolitical economy at SKEMA Business School, has now suggested that United could potentially be bought by Saudi Arabia's Public Investment Fund (PIF), which would require Newcastle's owners to sell the north-east club to acquire another Premier League side.