Jose Mourinho has reportedly expressed concerns over Rashford, who started both games for England last month, receiving an excessive amount of minutes on the pitch after Harry Kane, Raheem Sterling and Dele Alli were all ruled out.
Young, meanwhile, could play for England for the first time in four years after receiving his first call-up since September 2013.
The trio were seen going through the hard yards at St George’s Park ahead of the clash with the world champions.
While the sight of Rashford skipping past defenders in an England shirt provides a pleasant break from the usual misery associated with watching the national team, supporters will hope to see him only used sporadically against Germany and Brazil, especially after he missed out on the starting XI at Anfield because he was overworked by Southgate following a busy September month.
On the other hand, seeing how Young fares as a wingback in Southgate’s back three system will be something every England supporter should watch closely given that no obvious options for that role came out of the previous group.