A2 National Category (Α2 Εθνική Κατηγορία) were formed. The 1988–89 season, marked the first time that Greek Basket League teams were allowed to have foreign players on their rosters. The fourth era of the championship began in the 1992–93 season, when the Hellenic Basketball Clubs Association (HEBA) took over the competition and renamed the first division the HEBA A1 (ΕΣΑΚΕ Α1). The league was then renamed to Greek Basket League (Ελληνική Μπάσκετ Λιγκ), starting with the 2010–11 season. The Greek League has been one of the most competitive basketball leagues in Europe through the years, and it was widely regarded as the second best national domestic league in the world, after only the NBA, in the 1990s decade. It currently ranks among the best national domestic leagues in the world (excluding the NBA), such as Liga ACB in Spain, VTB United League (counts as the domestic league for Russian clubs), and BSL in Turkey. It has always been considered one of the top 3-5 European national domestic leagues under the historical European national basketball league rankings and European national basketball league rankings. The league has several European historical basketball powers, which also belong to some of the most traditional European basketball clubs, especially Panathinaikos, Olympiacos and AEK (which had great success in the 1960s), which are three of the most successful European basketball clubs of all-time. Also, Aris, led by Nikos Galis, Panagiotis Giannakis, and Slobodan "Lefteris" Subotić, was the dominant Greek club, and one of the most powerful European teams in the 1980s. Other clubs that have had significant success throughout the history of Greek basketball, as well as success in European basketball, are PAOK and Panellinios. The first five aforementioned clubs (Panathinaikos, Olympiacos, AEK, Aris and PAOK), are also the most widely supported by fans in Greece. Despite the championship having been contested 80 times, only nine different clubs have won it so far. The dominating club has usually been Panathinaikos, having claimed the championship 39 times. Since the foundation of the Alpha National Category in the 1963–64 season, only two teams have participated in every season of the competition, Panathinaikos and Aris. Brand Name 1927–28 to 1962–63: Panhellenic Championship 1963–64 to 1985–86: Alpha (A) National Category 1986–87 to 1991–92: Alpha1 (A1) National Category 1992–93 to 2011–12: HEBA Alpha1 (A1) 2012–13 to present: Greek Basket League Sponsors ΕΚΟ Betshop.gr Stoiximan.gr Spalding Logo The main elements of the logo