That could open the door to a move for Nkunku, whose current deal with the German outfit expires in 2024. Unlike several Leipzig stars in the past such as Timo Werner and Dayot Upamecano, he does not have a release clause allowing him to leave for a set price.
Instead, it is believed a fee of around €75m (£63.1m) at least would be required to convince the club to sell. And that fee is only likely to increase if he makes his national team debut and continues his impressive form for Leipzig.
However, it remains to be seen whether United would be willing to stump up the cash required to sign the attacker, given the significant investment it would take. And if Rangnick does step aside at the end of the season as expected, his replacement may want to sign off on such a high-profile transfer before taking over.