Injuries have played their part in the Hornets' season so far and will do so in Silva's January spending too, with club owner Gino Pozzo already well aware of his intentions.
He said: "Of course everything is different if you have all your players available. We started pre-season with a lot of injuries, and we'll see what we can do during the January market. I hope we can do what we cannot do during August.
"It's for us to decide where to strengthen, our board knows what I want and need to improve; some of the things we did not manage during the last market, I hope we can during the January window.
"It's not about numbers, I want players who will improve our squad."
The Watford Observer says Watford have reportedly joined the race to join 22-year-old Malian starlet Fousseni Diabate, with Southampton and Real Betis said to be among the other sides watching the Ajaccio attacker.