The Rams head coach is worried that he may not be able to "field a team" for the start of the new season if the club fail to recruit fresh blood
Wayne Rooney has vowed not to quit as Derby boss, but the former Manchester United star has also called for new signings ahead of the 2021-22 campaign.
Derby were placed under a transfer embargo after being found guilty of breaching financial fair play rules last month, but the English Football League (EFL) has since softened its stance due to a significant shortage of registered senior players at Pride Park.