Victory took Bundesliga club Stuttgart into the quarter-finals of the German Cup.
Mavropanos beat his goalkeeper Florian Mueller,who had positioned himself next to the goal,with a hard hit no-look back pass after a throw-in four minutes into the game.
The German Football Federation tweeted that the effort from 48 metres was the furthest distance an own goal has been scored in competition history.
“It was a memorable start with the own goal. A real setback. Konstantinos will be telling his grandchildren about it,” Stuttgart sports director Fabian Wohlgemuth told Sky TV.
Newly signed Gil Diaz curled an equaliser in the 86th and Serhou Guirassy headed Stuttgart’s winner five minutes into stoppage time. It was the first win for new Stuttgart coach Bruno Labbadia in his fourth game in charge.
AAP,DPA
Watch every match of the and on Stan Sport. Returns for the Round of 16,with all the action streaming ad-free,live and on demand from February 15.