Borussia Monchengladbach have hit out at Bayern Munich for their transfer policy, whereby they have been snapped up promising German young players from other clubs.
Last summer, Gladbach lost youth prospect Sinan Kurt to Bayern Munich following weeks of negotiations, and a war of words between officials from both teams.
Kurt, 18, has yet to make his first team debut for Bayern, and has so far seen most of his game time with their under-19s. He has also featured in a handful of reserve matches, while jetted off with the first-team squad to their winter training camp in Qatar on Friday.
Germany under-21 international Joshua Kimmich, who ended his loan at Leipzig to move to the Allianz Arena in a multi-million deal from VfB Stuttgart last week, will also be on the plane.
Gladbach sporting director Max Eberl has now slammed Bayern's new policy of scouring other Bundesliga clubs to bolster their own academy.
He believes is also down to the appointment of Michael Reschke, who joined Munich from Bayer Leverkusen as technical director ahead of the 2014-15 season.
Eberl, who was named "shopper of the year" for two consecutive seasons by kicker magazine, praised Reschke as an "absolute expert" and "a definite reinforcement for FC Bayern."
"Of course, outstanding talents like [David] Alaba or [Thomas] Muller have come through their youth academy," Eberl told Rheinische Post. "But they have never been that successful with their youth teams, and I believe that this annoys them.
"But it is my opinion that talents should carefully consider where they learn their trade. If everyone answers the call of that one big club it would damage football. There are many examples of talents following that call and then disappearing into obscurity.
"Players can also earn their stripes elsewhere, and then join FC Bayern. That way other clubs also profit because transfer fees go to the clubs. When you harvest the talents before they are ripe, I don't whether that's any good for German football."
Bayern have in the past been criticised for signing players from their biggest domestic rival in recent years, Borussia Dortmund.