The Rangers Director of Football worked with the youngster before switching to Ibrox.
A player well known to Rangers' Director of Football is reportedly wanted in Scotland.
And while the identity of the interested Scottish party (or parties) remains to be seen - Nmecha is also said to be alerting clubs in his native Germany having scored or made nine goals in 24 starts for Preston - Mark Allen's connections perhaps make Rangers a logical shout.
Allen was head of City's academy when the club became the first ever to have seven players capped by England's Under-16s in a single season, with Nmecha (who has since represented Germany at u21 level) being one of those selected.
And given that Rangers are thought to be seeking further additions to their forward line - as Greg Stewart's proposed move to Ibrox continues to evade confirmation - there is further good reason to suspect interest from Steven Gerrard's side.
Like Stewart, Nmecha can operate as a striker, winger or number 10, although the 20-year-old's pace could make him a more desirable option.
Would Nmecha be a good addition for Rangers?
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