Marco Silva is relaxed about Richarlison's future at Watford, saying "it's normal" that other clubs would be interested in the Brazilian forward.
The 20-year-old has impressed since moving to Vicarage Road from Brazilian side Fluminense for £13m in August, scoring five goals in the Premier League.
Recent reports suggested that Richarlison's early season form has attracted interest from some of the Premier League's biggest sides, prompting Watford CEO Scott Duxbury to warn that the player was not for sale.
Despite the speculation, Silva remains calm over Richarlison's future. He said: "For us as a club it is important to keep our best players.
"It's normal. We know our players are doing well and some are improving a lot. It's normal other clubs pay attention to them.
"After it's that it's the club's decision. The owner will decide what is best."
Watford host Tottenham in the Premier League on Saturday, but will have to do so without a handful of first-team players.
Silva said: "We have a question with Will Hughes. It will be really difficult for him for tomorrow. There is still a doubt with Miguel Britos as well. The others - Younes Kaboul and Craig Cathcart - are the same.
"Isaac Success is coming slow with the team. I believe he will soon be in full training.
"The others progress well but are not available."