Zmagoslav "Zmago" Sagadin ( /sɑːˈɡɑːdɪn/, born November 1, 1952 in Celje), whose first name in Slovene origins from a word "winner", is a Slovenian basketball coach. He is founder of Slovenia's first national basketball team and co-founder of the Adriatic Basketball League. Sagadin is widely considered as the most successful Slovene and top European basketball coach with 25 championship titles both on a national and international level. He has been recognized 9 times as a Slovenian Top Coach of the Year and received various honor awards.
Sagadin is known for his development of players who compete internationally and in NBA. Success of Union Olimpija Ljubljana (formerly Smelt Olimpija), during his time coaching the team, contributed to establishing basketball as part of Slovenian sport culture and recognition of Union Olimpija as a reputable European club.
Sagadin is author of basketball-related articles, served eight years as a President of Slovenian Basketball Coaches Association, and lectures for KZS, FIBA and ULEB-organized seminars and clinics.
Sagadin signed a contract with top Croatian team KK Zadar in February 2009.