The England international’s current deal expires at the end of the season, and although the Villains are keen to extend his stay the midfielder is reluctant to commit.
Despite an initially bright start to the campaign, Delph is thought to be concerned by the club’s progress in recent years, which has been highlighted by the recent slump in terms of results.
This has alerted Spurs, Arsenal and Liverpool, who are all watching the enforcer.
The 24-year-old was recently handed his Three Lions debut by Roy Hodgson, and is understood to have serious ambitions to push on and cement himself in the set-up.
He is rumoured to be concerned that these aims cannot be met at Villa Park, with Paul Lambert’s side having narrowly avoided relegation on a few occasions in the past few seasons.
Ron Vlaar is in a similar situation, with Manchester United rumoured to be keen.