SG Flensburg-Handewitt is a professional handball club from Flensburg and Handewitt in Schleswig-Holstein, Germany. Currently, they compete in the Handball-Bundesliga and EHF European League. They play home matches at Flens-Arena. Since forming in 1990, the club has been one of Germany's most successful teams domestically and in European tournaments. The club is best known for winning the EHF Champions League in 2014 by defeating arch-rivals THW Kiel in the final 30–28.

The Handball-Bundesliga (HBL) is the top German professional handball league. From 2007 onwards, the league was sponsored by Toyota and has officially been called the Toyota Handball-Bundesliga. This lasted until 2012 when the Deutsche Kreditbank AG (DKB) became the new sponsor. The official name has consequently been changed to LIQUY MOLY Handball-Bundesliga. The winners of the respective season are the official German handball champions. HBL is headquartered in Dortmund.