Ženski Košarkaški Klub Trešnjevka 2009 is a Croatian women's basketball club from Zagreb currently playing in the First League of Croatia.

Its major success was winning the Ronchetti Cup in 1980 beating Maritsa Plovdiv in the final; it was the only Yugoslav team that won the competition.

It also reached the final in 1976 and 1981, but lost to Slavia Prague and Spartak Moscow.

Following the break-up of Yugoslavia it won three national cups between 1993 and 1996 and the national championship in 1999, remaining a regular in the Ronchetti Cup's preliminary rounds through the decade.

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