The Spanish midfielder is in the final year of his contract and there is a growing feeling inside the club the player is ready to walk away for free next summer.
The Red Devils certainly want to avoid that particular scenario and will try to broker a compromise deal in the next few weeks, with the feisty 29-year-old able to talk to clubs on the continent in January.
Herrera knows there is interest in him back in his homeland but the former Athletic Bilbao man has never hidden his passion or commitment for the United cause.
He has a young family settled in nearby Cheshire and United are running out of time to find a solution for a player they spent £32 million on back in 2014.
Herrera is due around £2 million in wages between January and the end of the season and United insiders state that is a fee they may look to recoup when the window reopens, should renewal talks come up short.