Thursday December 27, 2012 the basketball Euroleague 2012/2013 Top 16 is starting. In recent years, the Top 16 started around mid-January but this season the formula has been changed. In the new Top 16 there are only two groups of 8 teams each so there will be more games. This new structure with 4 teams for each group that will go to the quarter-finals will definitely change this second phase of the Euroleague.