Raiola is primed to sit down for talks with other interested parties, with the likes of United, Chelsea, Liverpool and Manchester City also in the hunt.
United boss Ole Gunnar Solskjaer views Haaland as the ideal upgrade on the likes of Anthony Martial and Mason Greenwood, who have both struggled for consistency this term.
Chelsea manager Thomas Tuchel would love to sign the Dortmund star having seen Timo Werner, Tammy Abraham and Olivier Giroud misfire this term.
Liverpool are monitoring Haaland amid uncertainty over Mohamed Salah’s long-term Anfield future.
And Manchester City are aiming to sign the 20-year-old as a replacement for Sergio Aguero, who will be leaving the Etihad Stadium behind this summer.
Meanwhile, speaking recently, Dortmund chief Matthias Sammer urged Haaland to think carefully before leaving the Westfalenstadion behind.