According to Italian outlet Corriere dello Sport (h/t Metro), Raiola-who does not represent Icardi-approached him with an offer from United, but the Argentina global did not want the agent to act on his behalf.
They are offering to increase Icardi's salary by nearly €2m, from €4.7m per season to €6.5m, along with a lucrative set of bonuses linked to team and individual achievements.
The Argentina frontman is the second top scorer in Italy this season with 18 goals from 24 Serie A games, but after a bright start by Inter they have fallen away and are now battling to finish in the top four.More news: United States pushes Russian Federation on Syria as UN warns of 'dangerous moment'
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However, the 24-year-old was not open to removing his partner from her position.
However, Icardi's entourage, headed by his wife and agent Wanda, are asking for a salary of £6.5m and want to keep the clause but raise it to £135m.
Zlatan Ibrahimovic, Paul Pogba, Romelu Lukaku and Henrikh Mkhitaryan are all Raiola clients who have moved to United recently while the super-agent is also listed as an intermediary for the Manchester giants.
Though he hasn't had the chance to prove himself at the top level because of Inter's decline in recent years-he's yet to taste UEFA Champions League football-Icardi looks to be well-equipped to handle the step up to a club like United.