Dortmund won in Hoffenheim and took the lead alone at +3 on Bayern Munich and Union Berlin who face each other on Sunday in the key match of the 22nd day.
It had been years since the Bundesliga had seen such an exciting sprint for the Scudetto.
The declines of Bayern (which, however, gave check to PSG at the Parco dei Principi, awaiting the return) led to a reunion with Dortmund and Union Berlin, which will be the opponent on Sunday in the much-anticipated big match.
Berliners are a rarity in football: they were once the working-class team, financed by fans with blood donations.
Now Union seems mature to remain competitive and dreams of tripping the multiple champions.
In Saturday's matches Frankfurt falls in Leipzig.
arouses curiosity
Overview of the 22nd day (RESULTS AND STANDINGS)
Mainz-Monchengladbach 4-0
Bremen-Bochum 3-0
Cologne-Wolfsburg 0-2
Hertha-Augsburg 2-0
Hoffenheim-Dortmund 0-1
Leipzig-Frankfurt 2-1
Schalke-Stuttgart 6.30pm
Freiburg-Leverkusen Sunday 3.30pm
Bayern-Union Berlin 5.30 pm