The Milan giants want to secure a deal in January, per Calciomercato.
However, Inter want to complete an 18-month loan deal for the player, along with an option to buy.
That would help Inter, who are a little strapped for cash, complete other deals as well.
It is unclear if Udinese would accept such terms for a sought after player such as de Paul.
Udinese value the player at roughly £31.5 million.