According to wikipedia the Supercopa Endesa 2017 will be played in the Gran Canaria Arena in Las Palmas on September.
The 4 teams involved are: Gran Canaria, Â Real Madrid, Unicaja Malaga and Valencia Basket.
Friday, 22 September
🇪🇸 Supercopa Endesa
18:30  Valencia – Malaga
semifinal 1
21:00  Gran Canaria – Real Madrid
semifinal 2
— • —
Saturday, 23 September
🇪🇸 Supercopa Endesa
18:30 Â winner sf 1 – winner sf 2
the final
— • —
All times are CET – Central Europe Time