The Hornets travel to Bournemouth on Saturday looking to build on an opening day draw at home to Liverpool.
Silva takes his side to the south coast with Troy Deeney having recovered from a pre-season groin operation.
After coming off the bench against Liverpool new-signing Andre Gray is also in contention to make his full debut for the club and Silva is pleased with both players' application in training this week.
Asked whether Deeney was training as normal with the rest of the team, Silva said: "He has started normal training with the team since Tuesday.
"He is starting to come fit, he had one week of pre-season until last week and it is important now we get him fit again so he can show me his football and show everyone what he can do to help the team.
"How desperate is he? It is normal, it is not a good situation for a player when you have an injury like him. It was a small surgery so now he is able to work 100 per cent with the team and it is our job to get him fit and into the team.
"He works hard, that is normal, he is trying to show his football to me and that is important.
"What I have seen from him in the last few days is what I expect, a player to work hard and do his best every day and this is what I expect not from him but from all the players."
Silva also explained that he left Gray out of the starting line-up last weekend because he had only had two training sessions following his club-record move from Burnley.
However, like fellow striker Deeney, Gray is ready to start his first game for the Hornets. "Of course now he has worked more time with the team.
"He knows better what are our ideas and what we need and now is the moment I will take the decision I believe is the best for the match."
The Portuguese coach will definitely be without Younes Kaboul, Daryl Janmaat and Roberto Pereyra after the trio all suffered muscular injuries against Liverpool.