The Red Devils agreed the new link-up with the German suppliers after talks with current sponsors Nike collapsed, and the change will take place in time for the 2015/16 Premier League season.
United have also recently struck a whopping £350million deal with Chevrolet, meaning that Louis Van Gaal has plenty of money to spend over the next coming years.
And Italian outlet Tuttomercatoweb claims that the Dutchman will look to follow up the signings of Southampton's Luke Shaw and Athletic Bilbao's Ander Herrera with that of Dortmund winger Reus.