Peter Bosz claims his side's poor first half was the reason behind Borussia Dortmund's 3-2 defeat against RB Leipzig.
It is Dortmund's first defeat in the Bundesliga this season, as Leipzig ended Dortmund's dominance at home, who were beaten for the first time in 41 games at the Westfalenstadion in the league, stretching back to Jurgen Klopp's tenure.
Despite his side remaining top of the Bundesliga, their lead has been cut to two points, with Bosz frustrated about how the game went.
Speaking post-match, Bosz said to the Bundesliga: "It wasn't a great game.