Dahlberg — who, at 19, has become the club's first-choice shot stopper — has a contract at the club which expires in December 2020.
Watford appointed Spaniard Javi Gracia as manager on Sunday, hours after sacking Marco Silva.
Gracia, 47, signed an 18-month contract with Watford who lie 10th in the standings and one of his first jobs will be to bolster the squad in sbobet ca what little time they have left in the window.
The Hornets have not made any signings in this window and have lost three of their last four games.
Only Stoke have conceded more Premier League goals than Watford this season and Dahlberg, should he come, will have his work cut out for him if they are to stop the rot. SHOW MORE CLICK HERE sbobet ca
