Friedrichshafen (dpa / lsw) - The German volleyball runner-up VfB Friedrichshafen is making improvements in terms of personnel. Ziga Stern comes from the Greek club Foinikas Syros and has signed a two-year contract, the Bundesliga club announced on Tuesday. The Slovenian is to replace Vojin Cacic, who is leaving VfB. Stern and his new club coach Mark Lebedev know each other from the national team.