The Zambian player scored twice in Salzburg’s 2-2 draw with Premier League champions Liverpool last week.
And United are jostling with the Reds and a number of other big clubs who have been tracking him.
Sadio Mane, Naby Keita and Takumi Minamino were developed at the Austrian club and Daka is the latest off the production line.
Old Trafford’s bosses have hesitated to signal Haaland to the Norwegian Molde for a down payment of 2.7 million pounds in July 2018.
Instead, the French striker joined Celtic.
But the Premier League giants were nowhere to be seen when Dembele joined Lyon in 2018.