Derby County boss Nigel Clough is desperate to keep hold of Will Hughes.
Liverpool, Arsenal and Fulham are all keen on the midfielder, who again impressed in victory over Middlesbrough.
Asked how many scouts were at the game, Clough replied: "I don't know but there have been a fair few at our games this season.
"There have been no bids for any player so far but its (the window) only been open for about 12 hours!
"We don't want to lose anybody but you know how it is in football. Maybe we will have to turn the phone off for a few days!"