Watford manager Marco Silva does not expect to sell any players in January and will be aiming to improve the squad.
Midfielder Abdoulaye Doucoure has been linked with a big-money move away from Vicarage Road when the transfer window opens, though the Hornets are also said to want to offer him a lucrative new deal.
Silva insists the club are aiming to strengthen the playing staff, not offload key men as he prepares for the visit of Premier League strugglers Swansea.
"Doucoure has a long contract with us. What we can do with that, if you want to do something because a player is doing very well, that's for us to do inside the club," Silva said at a press conference, broadcast on the club's website.