Spain clinched first place in Group B after celebrating their third consecutive triumph in an 81-62 upset of Latvia.
Latvia trailed 39-35 at half-time and were handed a blow when Spain went on an 18-5 run over the next 10 minutes to cruise to victory.
Latvia survived a late comeback from Belgium to clinch a 64-61 triumph on the second day of the U18 European Championship for Women.
Leading 63-57 with 30 seconds remaining, Latvia star Sabine Niedola saved the ball from going out of bounds but threw it into the hands of Belgian Jan Raman and she made an easy lay-up.
Latvia destroyed Turkey 84-50 on Thursday in Södertälje.
Sabine Niedola, a member of Latvia's squad at last month's EuroBasket Women, had a game-high 26 points while team-mate Kristine Vitola contributed 22.
All eyes in Istanbul are on the Turkey team that is about to play at the U18 European Championship for Women in Sweden.
Seventeen-year-old Pinar Demirok, a 1.82m forward who played on last year's team that finished ninth in Nitra, Slovakia, is with the squad again and she answered these questions by Basketball World News for FIBA Europe.
Abdi Ipekci Spor Salonu
10. Yil Cad.
, 34020 Istanbul, TUR
+90 (212) 414 77 00
+90 (212) 679 74 30
President: Turgay Demirel
Secretary General: Ali Ozsoy
Executive Director: Ali Ozsoy
Press contact: Serdar Ates