Cup winner VfB Friedrichshafen has also awarded its second championship match ball in the final series of the volleyball league.
Coach Mark Lebedew's team lost the hard-fought fourth game against the favorite defending champion Berlin Recycling Volleys on Wednesday evening 1:3 (26:24, 24:26, 24:26, 20:25).
After two Friedrichshafen victories at the start, it is 2:2 in the best-of-five series of the "eternal finals".
The decision will be made on Saturday (6.30 p.m. live on sportdeutschland.tv and Twitch), the BR Volleys then have the home advantage.
For record champions Friedrichshafen it would be the 14th title and the tenth double in the club's history. At the beginning of March, VfB had won the cup for the 17th time.
The capital club could be at the top for the twelfth time in total and for the sixth time in a row.
The two finalists have dominated German men's volleyball for decades.
In 1997, SV Bayer Wuppertal was the last champion who did not come from Berlin or Friedrichshafen.
On Saturday, the BR Volleys postponed the decision with a 3-0 win in their own hall, four days later it went back and forth.
Friedrichshafen gambled away a long lead in the third set, after which Berlin was unstoppable.