Slovenia scraped by Israel 69-66 and Greece hammered Belgium 96-67 in the final two games of the opening day's play in Belgrade at the U18 European Championship Men.
Slovenia looked to be well in control midway through the fourth quarter when Tadej Horvat buried a three-pointer for a 66-57 advantage.
But Israel stayed close and with only half a minute to play trailed 68-66 after their 1.95m forward Elishay Kadir made two free throws.
The Israelis then fouled Horvat, who left the door open for a comeback when he missed two from the line.
Slovenia guard Gasper Vidmar grabbed the offensive rebound, however, and got the ball back into the hands of Horvat, who was again fouled with 22 seconds to go and this time he split two for a 69-66 advantage.
On their next possession, Israel's Yogev Ohayon launched a three-point attempt but was off target and his country's hopes died.
Horvat had 20 points to lead Slovenia.
In Greece's triumph, Sotirios Manolopoulos had 28 points and Dimitrios Verginis 26 for the winners, who established a 29-16 advantage by the end of the first quarter and cruised to victory.