Bayern Munich manager Jupp Heynckes says that his side lost Saturday's game in the first half after losing 2-1 at Borussia Monchengladbach.
A severely injury hit Bayern were dreadful in the first half as a penalty from Thorgan Hazard and a tap in for Matthias Ginter were enough for fourth place Gladbach to claim a crucial three points and hand the 72-year-old his first defeat since returning as manager last month.
Talking to the Club's Official Website after the loss, Heynckes said: "We lost the match in the first half. We invested far too little then."
Bayern improved after the break, but were well under par compared to their usual standard. Heynckes praised his former club for their stubborn defence as they held on for victory, despite Arturo Vidal's second half strike that gave the Bundesliga champions hope.
He added to his previous statement, saying: "But it was one-way traffic in the second half. Mönchengladbach only had one chance on the break in injury time and nothing else. But they were clever in defence. My team invested a lot, they were hard-running and created some chances."
The defeat ended a nine game unbeaten run in the league and means Bayern are now just three points clear of second placed RB Leipzig, whilst their conquerors Gladbach moved to within five points of the leaders.