Sheffield United are close to the double signing of defender Panagiotis Retsos and forward Richairo Zivkovic.
Bayer Leverkusen centre-back Retsos is undergoing a medical with the Yorkshire club ahead of a move to the Blades.
The 21-year-old has made six appearances for Leverkusen this season, with the German side fifth in the Bundesliga.
A deal for Zivkovic is also close, with the former Ajax striker currently playing for Changchun Yatai, where he has scored 15 goals in 25 games in the China League One.
Sheffield United broke their transfer record to sign Norway international midfielder Sander Berge for £22m from Genk on Thursday.
"The board have really backed us in this window to bring in players of the quality of Sander. He fits the bill in so many ways," manager Chris Wilder said.
"I think this signing just shows how far we have come in a short space of time, that we are now attracting the likes of
Sander to the football club. It's a brilliant signing for us."
Sheffield United winger Mark Duffy, currently at Stoke on loan, is in advanced talks to sign for Alan Pardew's ADO Den Haag.