The Dutchman has signed just three new players - one permanent - since taking the reins at Sheffield Wednesday in January.
Fulham sacked manager Slavisa Jokanovic earlier today.
Sheffield United drew 0-0 at home to Sheffield Wednesday.
Cameron Dawson's impressive display against Sheffield United helped Sheffield Wednesday to their first clean sheet of the season.
The Sheffield Wednesday manager has overseen four straight defeats.
The Fulham boss was linked with the Sheffield Wednesday post in 2015.
No side in the Championship has conceded more goals than Sheffield Wednesday this season.
Sheffield Wednesday have several senior players who are currently out of the first-team picture.
The Sheffield Wednesday striker is currently on loan to Saturday's opponents, Norwich City.
The Sheffield Wednesday forward has yet to play against Sheffield United while wearing Owls colours.