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 underway.
Leeds are understood to be at the forefront of the race to sign him before his contract expires.
This comes as multiple reports show the English club’s determined pursuit of the German midfielder.
Both clubs are said to be considering their options thoroughly.
Brandt’s versatility and pace have drawn interest from several European teams.
Leeds’ manager praised the German's creativity and intensity.
If the deal goes through, Brandt could sign with the English side before the summer window closes.
Fans are already rumouring about his potential role in the midfield.
The transfer could also release funds for Leeds to reinforce other areas.