Donyell Malen's second-half goal salvaged a point as Borussia Dortmund were held at local rivals Bochum 1-1 on Saturday.

Dortmund fell behind early, Bochum's Kevin Stoeger unleashing a rocket from the edge of the box to catch the visiting defence off guard.

Malen scored early in the second half, his third goal in his past three matches, to level the scores.

The goal sparked Dortmund into action but Bochum held firm. English teenager Jamie Bynoe-Gittens had a late chance to win it for the visitors, but he missed from close range.

Despite the point, the draw raises more questions for Dortmund coach Edin Terzic, with his side's attacking riches failing to find fluency up front.

Elsewhere, Union Berlin lost a man early but romped to a 4-1 win away at Darmstadt, with Germany international Robin Gosens snaring two goals.

American midfielder Brenden Aaronson picked up a second yellow 21 minutes in, with Union 1-0 ahead against the promoted side after an early Gosens goal.

Darmstadt equalised just three minutes later but the undermanned visitors fought back, Gosens and Kevin Behrens both scoring headers to give Union a 3-1 lead at halftime.

Visiting centre-back Danilho Doekhi added a fourth -- again with the head -- midway through the second half.

It was the first time Union have won their opening two matches of the season in the top division.

Promoted minnows Heidenheim threw away a 2-0 lead to lose 3-2 at home against Hoffenheim, with Andrej Kramaric scoring an injury time penalty to win it for the visitors.

Heidenheim's Jan-Niklas Beste missed a penalty just 16 minutes in but made good minutes later, curling in a free kick from an impossible angle for the club's first ever top division goal.

Home forward Marvin Pieringer looked to have sealed the win with a goal midway through the second half, but Hoffenheim scored three times in the final 13 minutes to turn the match on its head.

Freiburg's Maximilian Philipp scored in the sixth minute of injury time to give his side a 1-0 home win against a struggling Werder Bremen.

Wolfsburg came from behind to win 2-1 at Cologne, Jonas Wind scoring twice in the second half, after Luca Waldschmidt scored to give the home side the lead with 55 minutes gone.

Wind, who scored twice in Wolfsburg's 2-0 home win over Hoffenheim last weekend, has now scored all of his side's goals this Bundesliga season.