Elvedi almost off
Tempers are heating up here. Elvedi is shown a straight red for scything down Beste. It's been reduced to a yellow card following a check.
Tim Kleindienst pops up at the back post to stroke in what looks like being the winner! Would you believe it?
Beste slams home the spot kick and we're in for a rip roaring final few minutes here.
Steve Breitkreuz is adjudged to have downed Schimmer and the ref points to the spot. A quick check and the spot kick stands.
Time added on!
We'll have eleven minutes added to the end of this game!
Somehow Jahn survive. Urbig's error initially leads to a plethora of shots on the Jahn goal. The keeper saves one of them and then sees Föhrenbach lash over. Amazing scenes.
Beste no way through
Beste tries a shot from a very tight angle but he's not beating the Jahn goalkeeper from there. Are Heidenheim heads dropping?
Desperate for goals, the visitors are pushing hard now. Have they left it too late? A relegation/promotion play-off spot is where they currently find themselves, with Hamburg ahead in their game.
Osei Owusu ovation
Huge applause for Osei Owusu as he heads off to be replaced by Joshua Mees. The departing forward has scored seven of his nine Bundesliga 2 goals after the winter break.
Owusu on fire
The hosts have had eighth shots on goal in this game, their formidable forward Owusu has had five of them.
Heidenheim are swarming. Urbig is a busy boy at the moment. The shot stopper deals well with a rasping Beste effort.
Kleindeist has a pop
It's all happening now. Kleindeist spins and sends a low poke at goal. Urbig gets down to hold on.
Heidenheim have a goal back! The hosts fail to clear their lines properly and when the ball pops back to Schimmer, the forward sends a low shot goalwards. There isn't much pace on the ball, but between Saller and goalkeeper Urbig, the hosts have helped the ball into the net. That was not pretty.
Jahn are soaring. Benedikt Saller decides to wander forward before aiming an effort towards the far post. There's no way the shot will get anywhere near the goal, but when Osei Owusu sticks out a peg, the ball deflects in for 2-0
More FCH woe
Lennard Maloney was involved in a nasty clash of heads and needs to be helped off the pitch. Norman Theuerkauf - himself just back from injury - is on.
As easy as that, the hosts hit the front. Konrad Faber's corner from the right flies over the Heidenheim defenders and lands squarely on the noggin of the leaping Osei Owusu. There was no stopping that.
Whatever was said in the Heidenheim dressing-room at the break has had the desired effect. The men in blue have started showing more energy and thrust this half. Schimmer is immediately into the action and should probably score from point-bank range, but the sub lashes wide.
Frank Schmidt makes a change at the break with the introduction for forward Stefan Schimmer.
Off we go again
Jahn get the second half underway.
Hats off to the hosts. They know they need the miracle of all miracles to avoid relegation here. A win and a 15 goal swing are among the factors required for the Red Shorts to survive but they're making a right go of it in front of their own fans. Heidenheim, not so much.
Easy for Urbig
Denis Thomalla sends a weak header at goal which Jonas Urbig gathers with his eyes closed. Not happening for the visitors thus far.
Saller cynically pulls back the onrushing Jan-Niklas Beste and that's a yellow card all day.
Konrad Faber tries the spectacular as he watches a dropping ball all the way. A good effort, but no dice for the Jahn man.
Jahn the busier
Yildirim launches one
Aygün Yildirim thrashes a shot through the legs of his opponent and looks on as the ball fizzes harmlessly wide.
Lennard Maloney is badly winded in a challenge and needs to come off for treatment. Meanwhile, the away side are mixing things up with Kevin Sessa coming on for Florian Pick.
The second-division's leading marksman gets Heidenheim in on the act. Tim Kleindienst's smash from distance licks the side-netting and draws a collective "oooh" from the visiting fans. FCH are alive.
Guwara - who has been on top form so far - whips in a menacing centre that Müller gathers at the feet of Albers. Crucial intervention.
Frank Schmidt takes advantage of a brief water break to issue Jan-Niklas Beste with some important instructions. Heidenheim need a spark of inspiration from somewhere.
The main man
Prince Osei Owusu Jan Schöppner
More Jahn openings
Osei Owusu stretches to meet Konrad Faber's menacing centre from the right. The forward just fails to connect.
Osei Owusu off target
Osei Owusu heads Leon Guwara's corner wide. The forward saw that one late. Jahn are playing like a team without any pressure at the moment. Heidenheim the more uptight of the two.
With Jahn getting more and more of a grip on this game, Heidenheim's supporters raise the noise levels as they look to spark some life into Frank Schmidt's men.
FCH edging it
Big chance Jahn
Leon Guwara slips a lovely ball through for Prince Osei Owusu. The forward looks to take it around Kevin Müller, but the goalkeeper stands his ground and blocks the shot with his upper body. A big moment early doors.
Heidenheim are making most of the early running here but the visitors have failed to produce a big chance against a Jahn side looking to counter.
News filters through of an early goal for Hamburg in their game at Sandhausen. As things stand, HSV leapfrog Heidenheim into the automatic promotion spot.
Visiting captain Patrick Mainka receives treatment for a head injury sustained during an early Heidenheim corner. Looks like he'll be ok to continue.
Heidenheim get the match underway! Will the visitors be celebrating with a first-ever promotion to the Bundesliga at the end of this one?
Here they come !
It's a stunning day in Bavaria as both teams make their way out onto the pitch. We're moments away from kick-off.
Teams in tunnel
The Jahn club song is belting out as the teams gather in the players' tunnel, high-fiving as they line up.
Both teams are coming to the end of their respective warm-ups at the Jahnstadion Regensburg. There's a superb atmosphere inside the ground for this huge Bundesliga 2 encounter.
Heidenheim certainly have the edge in terms of recent form on their opponents today. The visitors are unbeaten in six and have won the last four meetings between the teams.
Regensburg starting XI
Urbig - Saller, Breitkreuz, Kennedy, Guwara - Thalhammer, Gimber – Faber, Albers, Yildirim - Owusu
Kirschbaum, Nachreiner, Elvedi, Idrizi, Singh, Shipnoski, Schönfelder, Mees, Graf
Heidenheim starting XI
Müller - Busch, Siersleben, Mainka, Föhrenbach - Schöppner, Maloney - Pick, Thomalla, Beste - Kleindienst
Eicher, Theuerkauf, Geipl, Sessa, Burnic, Beck, Keller, Schimmer, Kühlswetter
Heidenheim cannot finish lower than third, which would ensure a two-legged play-off against the team that finishes 16th in the Bundesliga (one from Schalke, Bochum, VfB Stuttgart or Augsburg). Frank Schmidt's side contested the winner-takes-all tie back in 2019/20, losing out to Werder Bremen on away goals. If Regensburg pull off mission impossible, meanwhile, they'll get a reprieve via a two-legged tie against 3. Liga opposition.
Regensburg forward Charalambos Makridis - who scored his third goal of the season in the win against Eintracht - is suspended, but defender Steve Breitkreuz is available again following a one-game ban. For their part, Heidenheim should have Norman Theuerkauf back from illness.
Watch: Heidenheim 1-0 Sandhausen - highlights
Watch: Eintracht Braunschweig 1-2 Regensburg - highlights
More on those permutations
Heidenheim will be promoted if they equal or better Hamburg's result away at relegated Sandhausen, or lose by fewer than six goals and HSV draw. As for second-bottom Regensburg, they cannot achieve automatic safety and will only reach the play-off if they win and Arminia Bielefeld lose at Magdeburg with scores that achieve a 15-goal swing.
History beckons for Heidenheim!
In the third tier as recently as 2014, Heidenheim are one win from a maiden promotion to the Bundesliga. Anything else, and they'll be reliant on third-placed Hamburg dropping points at relegated Sandhausen. Stay tuned!