Hansi Flick reflected on Bayern Munich's surprise defeat to second-tier opponents on Wednesday.
DFB-Pokal holders Bayern Munich conceded a 95th-minute goal to draw 2-2 with Holstein Kiel before being knocked out on penalties.
Hansi Flick mengingatkan Bayern Munich supaya berhati-hati dengan Holstein Kiel apabila bertemu dalam pusingan kedua DFB-Pokal, awal pagi esok.
Bayern Munich will be expected to knock second-tier Holstein Kiel out of the DFB-Pokal, but Hansi Flick says they must not be complacent.
The DFB-Pokal second-round draw has taken place, with Bayern Munich and Borussia Dortmund to face Holstein Kiel and Eintracht Braunschweig.
Borussia Dortmund will host Borussia Monchengladbach in one of two all-Bundesliga ties in the DFB-Pokal second round.
Bayern Munich teenager Franck Evina has linked up with Holstein Kiel until June 2020.
Wolfsburg maintained their Bundesliga status with Monday's 1-0 win over Holstein Kiel to seal a 4-1 aggregate triumph.
Wolfsburg took a significant stride towards retaining Bundesliga status after beating Holstein Kiel 3-1 in the first leg of their play-off.
Bundesliga strugglers Cologne have a new head coach for next season, with Markus Anfang joining from Holstein Kiel.