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 ongoing.
Leeds are understood to be heading the race to sign him before his contract expires.
This comes as multiple reports indicate the English club’s ongoing pursuit of the German midfielder.
Both clubs are said to be weighing their options carefully.
Brandt’s versatility and acceleration have attracted interest from several European teams.
Leeds’ manager praised the German's inventiveness and work rate.
If the deal goes through, Brandt could sign with the English side before the summer window closes.
Fans are already wondering about his potential role in the midfield.
The transfer could also free up funds for Leeds to reinforce other areas.