Julian Brandt trained alongside 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 active pursuit of the German midfielder.
Both clubs are said to be weighing their options meticulously.
Brandt’s versatility and speed have attracted interest from several European teams.
Leeds’ manager praised the German's imagination and effort.
If the deal goes through, Brandt could sign with the English side before the summer window closes.
Fans are already speculating about his possible role in the midfield.
The transfer could also release funds for Leeds to reinforce other areas.