According to Sport1 (h/t Daily Star's Callum Vurley), the defensive midfield gem has been pinpointed by United as a potential new recruit, but Barcelona in particular could pose stiff competition.
Arsenal already have a strong German stable after adding Bernd Leno to the contingent of Mesut Ozil and Shkodran Mustafi, while former defender Per Mertesacker is now overseeing the club's academy.
Both United and Arsenal have made recent investment in the core of their midfields. The former followed up last summer's capture of Nemanja Matic by signing Fred from Shakhtar Donetsk this year, and the Gunners added Matteo Guendouzi and Lucas Torreira—both defensively inclined—in recent months.
Goal's Ronan Murphy recently posted a short profile of Maier, 19, who has already made two appearances for Germany's under-21 side:
Yet to miss a minute of Hertha's Bundesliga campaign, the teenager is clearly highly thought of in the capital. Only Ondrej Duda has averaged more passes per game (45.3) per 90 minutes in the league this season than Maier (42.7), per WhoScored.com.
Maier also boasts the highest pass completion of any Hertha midfielder to have started a game this season at 82.8 per cent, and he's one of three players averaging a team high of one completed dribble per game.
One obstacle for United is the fact Maier signed a new deal in Berlin in February, which runs until the summer of 2022. Germany were happy to celebrate the renewed loyalties of one of their fastest-rising assets:
Maier has been at Hertha for 11 years and may appeal more to the home comforts and native speakers at the Emirates Stadium, although United pose the better prospect in terms of playing UEFA Champions League football.
That could change next season depending on how this league campaign shapes up, at which point Maier may have his pick of clubs if he continues to shine for his Bundesliga employers.