Bayer Leverkusen midfielder Florian Wirtz is slowly approaching his top form having been out injured since March.
Borussia Mönchengladbach could make a move to sign forward Dion Beljo from Croatian side NK Osijek.
Youssoufa Moukoko's agent dismissed reports that the 18-year-old Cameroonian-born forward will extend his contract at Dortmund.
The development of players from the Bundesliga club's youth system will always be a priority for Borussia Monchengladbach, according to sporting director Roland Virkus.
Leeds have announced they have reached an "amicable resolution" with RB Leipzig with regard to their dispute over French forward Jean-Kevin Augustin.
Liverpool have been warned by Borussia Dortmund there will be no "gifts" in their pursuit of midfielder Jude Bellingham.