Teenager Mario Goetze scored one goal and set up the other as Borussia Dortmund won 2-0 at Mainz 05 on Sunday to leapfrog its opponent at the top of the Bundesliga.

The 18-year-old Germany under-21 midfielder showed why he is one of the most promising prospects in the league when he weaved his way into the box and wrong-footed keeper Christian Wetklo with a clever low drive in the 26th minute.

Goetze turned provider in the 67th, flicking on a through ball for Paraguay international Lucas Barrios to round Wetklo for his fifth league goal of the season.

Mainz, lacking its usual offensive spark, had Eugen Polanski's penalty saved by keeper Roman Weidenfeller in the 48th.

Dortmund equaled a club record with its fifth successive away win. Its fifth straight away victory from the start of the season is also a German Bundesliga record.

It is top with 25 points from 10 games, one ahead of Mainz.

"We applied our game plan very well against a tough opponent," said Dortmund coach Juergen Klopp, who spent 18 years with Mainz as a player and coach.

"The saved penalty was a key moment. We had luck on our side there. As for the Bundesliga title, we are giving it exactly zero thoughts at the moment."

Host Hoffenheim crushed Hanover 96 4-0 to move up to third on 18 points, level with Bayer Leverkusen which beat Schalke 04 1-0 on Saturday.

Hanover played most of the match with 10 men after Manuel Schmiedebach was sent off for a second yellow card on 19 minutes.