Tim Kleindienst (90+3) and Jan-Niklas Beste (90+9) delivered to the dismay of HSV players and fans following from afar.
HSV still has a chance to return to the top tier — where it played since the Bundesliga founding in 1963 before dropping in 2019 — with a two-leg playoff against 16th place Bundesliga finisher VfB Stuttgart.
• Who is Heidenheim, the Frank Schmidt-led club who have defied the odds to make it to the Bundesliga?