Marco Silva is keen to keep Nathaniel Chalobah out of the spotlight after he became the first Watford player to be called into the England squad in a decade.
Chalobah, 22, arrived at Vicarage Road in the summer having joined from Chelsea.
The midfielder has started both of the Hornets Premier League matches so far and has been called up by England boss Gareth Southgate despite only making his top-flight debut last season.
Ben Foster was the last Watford player to be named in the senior squad back in 2007 while on loan from Manchester United.