Borussia Dortmund's work rate out of possession was key as they went top of the Bundesliga by beating Heidenheim 4-2 on Friday, according to coach Nuri Sahin.

BVB moved onto seven points from their first three league games under Sahin with their victory at Signal Iduna Park, as Karim Adeyemi scored twice in between strikes from Donyell Malen and Emre Can.

Since losing 1-0 to Schalke in 2004, Dortmund have not lost any of their last 37 Bundesliga home matches played on a Friday, tying the Bundesliga record. 

Only Werder Bremen had previously remained unbeaten at home on Fridays through 37 Bundesliga matches in a row, doing so from 1984 to 1991.

"It was a deserved win and a very good start for us but then we shut the door and I told my players that Heidenheim will not give up. So we had to keep stepping on the gas," Sahin said in his post-match press conference.

"We had a few chances and we could have finished it off earlier but we dealt well with the pressure."

Dortmund, who had new signing Serhou Guirassy in the lineup for the first time following his recovery from injury, quickly took a two-goal lead in the first 17 minutes, Adeyemi teeing up Malen for the opener before getting his first of the encounter shortly after.

"We measure our players also on assists and goals but we can only defend well if the players press. Karim took the momentum from his Germany Under-21 performances with him," Sahin said.

"The first half was our best performance so far but we want to develop further."

Champions Bayer Leverkusen travel to Hoffenheim on Saturday while Bayern Munich, on six points, will look to make it three wins from three games when they take on newly-promoted Holstein Kiel.

Karim Adeyemi scored twice and set up another goal as Borussia Dortmund earned a 4-2 victory over visitors Heidenheim on Friday.

Adeyemi first set up Donyell Malen, who drilled his low shot through Kevin Muller to give the hosts the lead in the 12th minute.

The 22-year-old then doubled their advantage six minutes later with his first goal after completing a textbook break five minutes later.

Heidenheim briefly cut the deficit with Marvin Pieringer's powerful header after 39 minutes, but Dortmund restored their two-goal cushion before the break with Adeyemi's low drive wrongfooting the goalkeeper.

The visitors set up a nervy finish after being awarded a 74th-minute penalty for a foul by Niklas Sule on Mikkel Kaufmann, with Maximilian Breunig confidently hitting the back of the net.

But Dortmund earned a spot kick themselves in stoppage time thanks to Omar Traore's handball, and Emre Can coolly slotted in to make it 4-2.

Data Debrief: Home advantage

While it looked like Dortmund may be in for a nervy ending after Heidenheim's late penalty, that was not the case, and it means they extend an impressive home record.

The Black and Yellow are unbeaten in 37 Bundesliga home games on a Friday since a 1-0 loss to Schalke in January 2004, which is a league record, level with Werder Bremen between 1984 and 1991). 

Dortmund are unbeaten so far this campaign, but Heidenheim's six-match winning run in all competitions is now at an end.

Union Berlin scored a stoppage-time winner against Freiburg to secure their Bundesliga safety, despite missing two penalties on a dramatic final day.

Marco Grote's side, who participated in the Champions League during the first half of this season under former coach Urs Fischer, occupied the relegation play-off spot heading into the final day of the campaign.

Just three points clear of 17th-place Koln, who travelled to Heidenheim, they welcomed Freiburg to Stadion An der Alten Forsterei, knowing a defeat could spell the end of their five-year stay in the German top flight.

Mainz, two points clear of Union in 15th, moved themselves out of the relegation picture with a commanding 3-1 win at Wolfsburg.

That meant one of Union, Bochum or Koln would join already relegated Darmstadt in the second tier. One would have to settle for a play-off place, while the other would survive.

Koln went down 4-1 at Heidenheim, while Bochum's defeat at Werder Bremen by the same scoreline meant Union could leapfrog them with victory over Freiburg.

The hosts, for whom Josip Juranovic missed a first-half penalty, broke the deadlock in the 68th minute through Benedict Hollerbach.

However, they looked set for a relegation play-off when Ritsu Doan equalised for the visitors with five minutes remaining, before substitute Kevin Volland struck the post with his spot-kick early in stoppage time.

Nevertheless, there was to be a dramatic late twist as Janik Haberer struck in the 92nd minute to catapult Union out of the bottom three and to safety in 15th place.

Denis Undav's last-gasp Bundesliga leveller salvaged a 3-3 draw for Stuttgart against Heidenheim, who thought they had completed a remarkable turnaround moments earlier on Sunday.

Undav's 98th-minute equaliser kept Stuttgart four points clear of fourth-placed Borussia Dortmund as Sebastian Hoeness' side continue to chase Champions League qualification.

Hoeness’ side appeared to be cruising after ‪Serhou Guirassy and Angelo Stiller were both on target at MHPArena, though Stuttgart goalkeeper Alexander Nubel's own goal laid the foundations for late drama.

Tim Kleindienst capitalised with two quick fire goals to snatch an unlikely Heidenheim lead with five minutes remaining, yet Undav provided the last twist to snatch a share of the spoils.

Stuttgart thought they had managed an eighth-minute opener when Guirassy powered home from the edge of the penalty area after Undaz’s offload, though a VAR check ruled the strike out for offside.

Undav's threaded pass then found Chris Fuhrich but his driven effort was saved well by Kevin Muller, though Hoeness' side eventually found the breakthrough just before the interval.

Guirassy arrived in the perfect position to convert a delivery from Stiller, who placed the ball on a plate for the 41st-minute opener.

Stuttgart doubled their lead after the break as a sensational move ended with Stiller playing a smart one-two with Undav, before the German midfielder slotted the ball under Muller.

Heidenheim were gifted a glimmer of hope as Nubel made an inexplicable mistake when failing to hold Kleindienst’s header – and the visiting striker would further punish the hosts.

Kleindienst fired home a volley from a Jan-Niklas Beste cross in the 84th minute, before powering a header into the back of the net from Eren Dinkci's centre just moments later.

Yet with just seconds remaining, Undav pounced inside the box to unleash a thunderous shot into the bottom corner, salvaging a late point for the hosts.

Harry Kane continued his prolific start to life at Bayern Munich with a brace as the reigning Bundesliga champions held off a fightback from newcomers Heidenheim to claim a 4-2 victory.

Kane put Bayern in charge with two first-half goals – taking his tally to 21 in all competitions for the German giants – but the visitors threatened to stage a stunning upset as Tim Kleindienst and Jan-Niklas Beste struck within three minutes of each other after the break to draw level.

The drama continued as the hosts quickly regained their lead just minutes later through Raphael Guerreiro before Maxim Choupo-Moting’s header sealed victory for Thomas Tuchel’s men.

The three points sends Bayern top of the Bundesliga, one point ahead of Bayer Leverkusen who face Union Berlin on Sunday.

Bayern’s first chance came in the opening minutes following a Leroy Sane free-kick, which found Dayot Upamecano but the defender’s header flew wide and Sane went close himself just minutes later when his volley was blocked.

Kane’s impressive form continued as he put the hosts ahead in the 14th minute after Sane sprinted down the right flank to find the England captain in the box and he turned to fire into the corner.

Heidenheim had a chance to level moments later when Kleindienst smashed the ball wide and Sane nearly doubled the lead at the other end after being threaded through by Kane, but his effort flew wide.

Beste did well to cut in from the left but was unable to trouble the Bayern defence when his shot missed the target before Bouna Sarr had an excellent chance for the hosts saved by Kevin Muller.

Sane and Kane’s fantastic partnership struck again in the 44th minute as the winger’s corner picked out Kane in the box and he rose highest to head home into the top corner, earning his 17th league goal of the season.

Kane nearly claimed a third successive Bundesliga hat-trick in the 58th minute after Sane played him through but Muller did well to block the shot with his leg.

With Bayern seemingly well on course for victory, Heidenheim suddenly mounted a quick comeback with two goals in three minutes.

They pulled one back in the 67th minute on the break when Eren Dinkci picked out Kleindienst at the back post and he made no mistake this time.

The promoted side then equalised when a mistake from Bayern defender Kim Min-jae saw Beste pounce on a loose pass to fire over Manuel Neuer, but the frantic action continued as Bayern retook the lead two minutes later.

A brilliant cross by Konrad Laimer found Choupo-Moting and, although Muller reacted well to save his effort, Guerreiro raced onto the rebound to blast the ball into the bottom corner, scoring his first Bayern goal.

On the hunt for another treble, Kane fired over the bar before having an effort blocked but an unmarked Choupo-Moting put the game to bed in the 85th minute, nodding the ball into the bottom corner.