AUGSBURG – Bundesliga leaders Borussia Dormund are lacking the maturity needed to be champions, club adviser Matthias Sammer has said following their shock 2-1 defeat at fourth-bottom Augsburg on Friday.
Mistakes in defence led to both Augsburg goals, with South Korean forward Ji Dong Won scoring either side of the break before Paco Alcacer's 81st-minute consolation.
Sammer, who as a player with Dortmund won two Bundesliga title before winning a third as club coach, said young players were making mistakes.
"That's what makes champions – and at 19 or 20 you can't be a champion," Sammer said of the youthful Dortmund squad in comments as TV pundit for Eurosport.
Dortmund were going into games with the public perception they were already champions "but they are immature, they are just immature." The game was not decided on the pitch "but in the head," he said.