The former Bayern Munich midfielder completed a move to Old Trafford in July 2015 but departed in March 2017 after it became clear that he was not in the plans of Jose Mourinho.
United have established fresh interest in another Bayern player ahead of January – Muller – following a dreadful start to the 2019-20 campaign.
Speaking in an interview over the weekend, Schweinsteiger revealed that Van Gaal was adamant about completing the signing of Muller, who he managed during his time at the Allianz Arena.
Bastian Schweinsteiger: "Van Gaal really wanted him [Thomas Müller at #mufc]. He always asked me 'What's your friend Thomas doing?' — maybe that [wanting to leave Bayern] has changed in the meantime." #mulive [@cfbayern]
— utdreport (@utdreport) November 3, 2019
While United’s approach for Muller went nowhere in 2015, with the German happy winning trophies in Munich, there are several reports suggesting that the striker is considering a move away having lost his starting place under Niko Kovac.
Should he decide to move, United may well be able to sign him for a cut price in January should they fail in their pursuit of Mario Mandzukic, who remains the main target.