Watford have reportedly informed Paris Saint-Germain and Everton that midfielder Abdoulaye Doucoure is not for sale at any price.
The 25-year-old recently emerged as a January target for French giants PSG, while Everton - under the management of former Hornets boss Marco Silva - have also been tipped to make a move.
Watford could bring in up to £50m through the former France Under-21s international's sale, but The Mirror claims that club chiefs has ruled out conducting any business for their star players.
Doucoure started Saturday's 1-1 draw with Newcastle United on the bench, ending his sequence of playing every previous minute of this season's Premier League campaign.
Watford convinced the former Rennes and Granada ace to sign a new five-year deal at Vicarage Road last summer, despite interest from elsewhere.