Derby have been given permission by Chelsea to discuss a move for Kasey Palmer, according to Sky sources.
Palmer spent the second half of last season on loan at Pride Park Stadium as the Rams fell short of promotion to the Premier League, losing to play-off champions Fulham in the semi-finals.
The 21-year-old played a key role in Huddersfield's promotion to the Premier League in the 2016/17 campaign.
After agreeing a second season-long loan deal at the Kirklees Stadium, Palmer was forced to return to his parent club after picking up a recurrence of a hamstring injury last September.
Palmer is believed to be one of a number of players waiting to find out if Chelsea want him to stay at the club, go out on loan or leave the club on a permanent basis.