Watford is yet to receive a suitable offer for Nigerian forward, Emmanuel Dennis.
The Hornets are willing to sell Dennis following their relegation from the Premier League last season.
Everton, Southampton, West Ham United and Nottingham Forest are among the clubs who have made enquiries for the versatile striker.
Watford will only entertain offers in the region of £20m for the player.
Dennis only linked up with the London club from Belgian Pro League outfit, Club Brugge for £3m last summer.
He scored 10 goals and recorded six assists in 33 league appearances for the club.