Steve Cooper knows the Foxes need new recruits to make them ready for the Premier League. They have already made four signings - including defender Caleb Okoli from Atalanta - but the manager wants more.
They are keen on Juventus' Matias Soule for their return to the top flight after one season in the Championship.
The goalkeeping situation has also changed at the King Power with No.2 Jakob Stolarczyk ruled out for up to six months after ankle surgery.
"We definitely have to bring players in - everybody knows that," said Cooper after Tuesday's 2-1 friendly win at Shrewsbury.