Borussia were knocked out of the cup in Bremen despite having more shots (22-9) – and it was a similar story in Leverkusen as they lost despite having 12 shots to the home side's nine. Even a new goal record wasn't enough to get them points. The match facts.
Scoring since 2008: Mats Hummels is the only player who has scored at least once in each of the past 12 Bundesliga seasons. Fifteen of his 23 goals in the German top flight have been headers. It was his first goal for BVB since scoring against Liverpool in the UEFA Europa League in April 2016 and his first Bundesliga goal for the Black & Yellows since netting against Frankfurt in December 2015.
Scoring again: Emre Can scored his first Bundesliga goal since May 2014 (for Leverkusen in Frankfurt). In total, it was his fifth Bundesliga goal – but his first from outside the penalty area and his first with his right foot. His first goal for BVB came from his first shot for the club.
Scoring again against Bayer: Left-back Raphael Guerreiro had more touches of the ball than any other BVB player (94), was involved in two of the three goals (one goal, one assist) and won an impressive 69% of his challenges. The Portugal international has scored two of his four goals this season since the winter break (netted against Cologne too) and two of his four goals this term against Leverkusen.
Average age of 19: At one point, BVB's forward line had an average age of 19: Giovanni Reyna is 17, Erling Haaland and Jadon Sancho 19, and Achraf Hakimi 21.
Goal record: BVB have scored 59 goals in 21 matches – more than they have ever had before at this stage of a season. Their previous record was 58 goals in 1963/64.
Record equalled: Borussia Dortmund have scored 18 goals in their first four games since the winter break and in doing so have equalled the Bundesliga record (held by Mönchengladbach and Bayern).
Unusual: Borussia Dortmund have lost two competitive matches in a row for the first time in almost 11 months – and suffered a defeat against Bayer Leverkusen for the first time in over three years.