United aren’t the only club interested in landing the 23-year-old.
Arsenal boss Mikel Arteta sees him as the ideal player to replace Mesut Ozil, who has struggled for form under the Spaniard at the Emirates.
And Liverpool also like the Leicester star amid Jurgen Klopp’s hunt for more attacking reinforcements.
Meanwhile, ESPN pundit Steve Nicol has urged Maddison to reject United and wait for Liverpool or Manchester City instead.
“Under normal circumstances this would be kind of a no brainer, somebody like him, playing at a provincial side shall we call them in Leicester City,” Nicol told ESPN.
“The big guns of Manchester United come calling for you and it’s only a matter of, can the two clubs sort it out financially? That’s what used to happen.