Sancho has yet to either score a goal or provide an assist since his big-money move from Borussia Dortmund, with his arrival somewhat overshadowed by the stunning return of Cristiano Ronaldo to the club.
The 21-year-old’s sedate start to life with United has not cost him his place in the England squad, though national boss Southgate admitted his form perhaps did not warrant selection for the upcoming fixtures against Andorra and Hungary.
"Does he deserve to be in on these performances over the last few weeks? Well, probably not," Southgate said on Thursday, though he did make clear England believe the player can reach a "high level".