Marcelino To Replace Keegan?
Marcelino surfaced as a possible Toon boss in March, but the rumours died down as Keegan turned around the team's fortunes around.
However, the Magpies are said to have contacted Marcelino's agents this week following his resignation as Racing Santander coach.
And the Sunday Sun understands that United have been in regular communication with the 42-year-old's representatives via a member of their new scouting network in Spain.
Marcelino walked out on Wednesday, insisting Racing do not have the resources to fulfil his managerial ambitions.