Serbia & Montenegro beat Spain with something to spare, prevailing 70-54.
The Spaniards started well and took the first quarter 18-14 but the host nation dominated the second which they took 22-8 for a 36-26 half-time lead in the Group F fixture.
Spain won the U18 European Championship Men title in 2004 and they are off to a winning start in the tournament one year later after edging Latvia 84-82 on the first day of games in Belgrade.
The Spaniards rode their luck as Latvia missed a potential game-tying jump shot with three seconds to play.
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