Head coach Javi Gracia wants other Watford players to step up if Abdoulaye Doucoure leaves for Paris Saint-Germain.
Doucoure signed for Watford in January 2016, playing the first few months on loan at Granada in La Liga before heading to England ahead of the 2016-17 campaign.
His first season passed without much fanfare, but in 2017-18 the Frenchman really caught the eye, impressing with his all-action, box-to-box displays in midfield and scoring seven goals from 37 Premier League starts.
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He has continued to look the part for Watford this term and emerged as a reported target for PSG, who are eager for midfield reinforcements due to the potential imminent retirement of Lassana Diarra and Adrien Rabiot seemingly on his way out.