MK Dons have signed midfielder Sergio Aguza from Real Madrid Castilla.
Sheffield Wednesday defender Tom Lees has committed his future to the club until 2019.
United have already recruited four players from the Italian leagues this summer in the shape of Marco Silvestri, Gaetano Berardi, Souleymane Doukara and Tommaso Bianchi and Benedicic could be the next one to arrive at Elland Road.
Benedicic has yet to make his senior debut for Milan, but is a regular in their Under-19 side.
The 18-year-old attacking midfielder is also a Slovenia Under-21 international and he is highly-rated at the San Siro.
Milan are happy to loan out Benedicic so that he can gain some valuable first-team experience and Leeds are thought to be at the front of the queue to bring in the Slovenian.