Dortmund's Felix Nmecha, center obscured, celebrates scoring during the German Bundesliga soccer match between Borussia Dortmund and Holstein Kiel at Signal Iduna Park in Dortmund, Germany.

Dortmund's Serhou Guirassy, left, celebrates his after scoring with teammate Waldemar Anton during the German Bundesliga soccer match between Borussia Dortmund and Holstein Kiel at Signal Iduna Park in Dortmund, Germany.

Dortmund's Felix Nmecha, right, and Kiel's Nicolai Remberg in action during the German Bundesliga soccer match between Borussia Dortmund and Holstein Kiel at Signal Iduna Park in Dortmund, Germany.

Dortmund's Marcel Sabitzer, left, celebrates after scoring next to teammate Felix Nmecha during the German Bundesliga soccer match between Borussia Dortmund and Holstein Kiel at Signal Iduna Park in Dortmund, Germany.

Dortmund goalkeeper Gregor Kobel, center, and Niklas Suele in action against Kiel's Alexander Bernhardsson during the German Bundesliga soccer match between Borussia Dortmund and Holstein Kiel at Signal Iduna Park in Dortmund, Germany.

Leverkusen's Patrik Schick, center, celebrates with teammates after scoring a penalty, during the German Bundesliga soccer match between 1. FSV Mainz 05 and Bayer Leverkusen, at the Mewa Arena, in Mainz, Germany.

Mainz's Nadiem Amiri, foreground right, plays vies for the ball with Leverkusen's Exequiel Palacios, during the German Bundesliga soccer match between 1. FSV Mainz 05 and Bayer Leverkusen, at the Mewa Arena, in Mainz, Germany.

Mainz's Andreas Hanche-Olsen celebrates with his teammates after scoring a goal that was later disallowed, during the German Bundesliga soccer match between 1. FSV Mainz 05 and Bayer Leverkusen, at the Mewa Arena, in Mainz, Germany.

Mainz's Paul Nebel, left, scores a goal, during the German Bundesliga soccer match between 1. FSV Mainz 05 and Bayer Leverkusen, at the Mewa Arena, in Mainz, Germany.

Leipzig's Ridle Baku, center, celebrates with teammates David Raum, left, and Xavi Simons after scoring during the German Bundesliga soccer match between RB Leipzig and VfB Stuttgart at the Red Bull Arena in Leipzig, Germany.

Leipzig's Xavi Simons celebrates after scoring during the German Bundesliga soccer match between RB Leipzig and VfB Stuttgart at the Red Bull Arena in Leipzig, Germany.

Leipzig's player Antonio Nusa, right, and Stuttgart's Luca Jaquez battle for the ball during the German Bundesliga soccer match between RB Leipzig and VfB Stuttgart at the Red Bull Arena in Leipzig, Germany.

Stuttgart player Nick Woltemade celebrates after scoring a goal during a Bundesliga soccer match between RB Leipzig and VfB Stuttgart in Leipzig, Germany.