Manager Jupp Heynckes thinks Bayern Munich should put more effort into signing Germany's most promising players.
Heynckes, who returned for his fourth stint with the club in October, cited Timo Werner, 21, as one player who Bayern may regret failing to recruit after Stuttgart accepted RB Leipzig's €10-million offer for the German prodigy in 2016.
"A club like Bayern should have signed a Timo Werner from Stuttgart years ago," Heynckes said, according to Mark Lovell of ESPN FC.
Heynckes added: "The best players must play - it does not matter whether they are old or young.
"Do you think that a Franck Ribery can always expect to play? No. When he is not on form, he will not play.
"As I said, you have to look after good, young players in a timely fashion. You have to challenge, speak, lead, and motivate them."
A year after scoring 21 goals during his first season with Leipzig, Werner has struggled to maintain fitness, but continues to find the back of the net after banging in six goals in nine league appearances.
The 72-year-old manager urged Bayern to develop its own players but maintained the club should also be ready to sign the world's most talented players.