Belgium closed on a 10-0 run to beat Switzerland 72-67 in the pick of the opening day's games at the U20 European Championship Men Division B in Pitesti, Romania on Friday.
The teams swapped the lead nine times before Belgium's strong finish gave them a winning start to Group B.
Point guard Emmanuel Lecomte, played, and dominated, all 40 minutes, finishing with an impressive stat line of 26 points, 8 rebounds and 5 assists.
Switzerland can bounce back on day two however, as they face Cyprus, who lost their opener 66-58 to the Netherlands.
The Cypriots were in a good position after with a 38-24 lead in the second period. But Olaf Schaftenaar's tip-in sparked a 13-0 run to cut the Dutch deficit to one (40-39) before they outscored Cyprus 15-8 in the final period.
Portugal won the other game in Group B with a 93-71 success over Finland. A 10-0 run midway through the second period stretched Portugal's already healthy lead to 22 and they never looked back.
Portugal's supremacy was highlighted by the fact that 14 of their players scored, Miguel Cardoso leading them with 14, while Joonas Cavén had to shoulder the scoring load for Finland scoring 23 points from 29 field goal attempts.
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Great Britain's Devon Van Oostrum is the only player from last year's All Tournament Team playing in this competition and he didn't disappoint in his team's Group A opener.
The point guard led the Brits to a 75-62 victory against Slovak Republic with 29 points 10 rebounds and 5 assists.
Two of Oliver Tot's 15 points closed the gap to six (57-51) in the fourth quarter before Nicholas Lewis responded with a jump shot to re-establish the control Great Britain had from the first quarter.
The second game in Group A paired Luxembourg and Hungary, the bottom two teams from last year's tournament.
Hungary appeared fuelled by last year's failings and powered to an 84-61 win thanks to their domination on the glass.
They won the rebounding battle 63-25, with Rosco Allen collecting 10 of them to go with his 15 points.
Luxembourg point guard Bob Melcher led all scorers with 23 - but the game was over as a contest early on.
Finally, Poland, who just missed out on promotion to Division A last year, underlined their credentials with a 92-62 demolition of the hosts Romania.
The game was tied at the end of the first quarter but a 12-0 Poland run to start the second gave them a lead they would never relinquish, eventually finishing with five players in double figures, Mateusz Ponitka leading them with 18.
Alexandru Olah had the same tally for Romania, who will hope for better against Slovak Republic tomorrow.