Hull City defender Andrew Robertson has reportedly been made available for transfer during the summer window.
Robertson has made a total of 116 appearances in his three years at the KCOM Stadium, but he has just a year remaining on his contract.
Due to Hull's relegation to the Championship, he is unlikely to sign a new deal, especially with a number of teams in the Premier league said to be keen on his signature.
According to The Mirror new boss Leonid Slutsky has taken the decision to cash in on the Scottish international rather than potentially losing him on a free next summer.
Watford are managed by Marco Silva, who was in the Tigers dugout during the second half of last season.