Jerome Boateng has told Bayern Munich to shape up defensively or risked being "destroyed" by Paris Saint-Germain on Tuesday.
The Bundesliga champions moved six points clear at the top of the table with a 3-1 win over Hannover on Saturday but Boateng was concerned by their display in the first half.
Jupp Heynckes' side did not regain their lead until Kingsley Coman struck with 67 minutes played, before a late Robert Lewandowski penalty made the points safe.
"We did not defend very well after losing possession and gave Hannover a lot of space, especially in the first half," said the centre-back.
"In the second half, we had a better organisation but, if you play like this against Paris, they will destroy you."
Unai Emery's side lost their first match of the season on Saturday, as they slipped to a shock 2-1 defeat away to Strasbourg in Ligue 1.
