Julian Brandt trained together with Kai Havertz at Bayer Leverkusen on Thursday.
Leeds United have submitted a registered bid for the free agent.
Negotiations with Leverkusen over Brandt’s contract remain in progress.
Leeds are understood to be heading the race to sign him before his contract expires.
This comes as multiple reports confirm the English club’s ongoing pursuit of the German midfielder.
Both clubs are said to be considering their options carefully.
Brandt’s versatility and pace have garnered interest from several European teams.
Leeds’ manager praised the German's inventiveness and intensity.
If the deal goes through, Brandt could join the English side before the summer window closes.
Fans are already rumouring about his likely role in the midfield.
The transfer could also unlock funds for Leeds to reinforce other areas.