Holding, who has been with the club since the age of eight, has been heavily linked with a move to the Premier League.
The 17-year-old striker replaced Scott Sinclair for the closing stages of Saturday's 0-0 draw with Newcastle United at Villa Park.
Spurs are currently second in the Premier League table.
Ronny Deila will leave Scottish Premiership giants Celtic at the end of the season.
A second-half brace from Dwight Gayle saw Crystal Palace overcome the Potters, although Hughes was left unimpressed by referee Kevin Friend's performance.
Burnley and Middlesbrough have won automatic promotion to the Premier League from the Championship.
A number of QPR's first-team players are out of contract in the summer, leading Hasselbaink to predict a summer of transition at Loftus Road.
Aston Villa are on the look out for a new manager to take charge while they are in the Championship.
The 22-year-old Tottenham Hotspur loanee served up the game-winning assist in Saturday's 3-2 victory over the Blues at the Stadium of Light.
The Accrington Stanley midfielder will join the Scottish Championship side at the end of the season.