Giannis Antetokounmpo scored 34 points in his Olympic Games debut on Saturday, but Canada beat Greece 86-79 in Group A.
The Milwaukee Bucks star also had five rebounds and two assists, and he dunked with 48 seconds left to bring Greece back to 80-78 after Canada led by as many as 16 points.
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But Shai Gilgeous-Alexander hit a floater over Giannis with 42.8 seconds left to restore a four-point edge. Gilgeous-Alexander scored 21 points.
During the Paris 2024 Olympic Summer Games, Greece forward Giannis Antetokounmpo shoots against Canada point guard Andrew Nembhard and centre Trey Lyles at Stade Pierre-Mauroy.
Canada, viewed as a potential competitor to the United States for the gold medal in the sport, received 23 points from RJ Barrett.
Antetokounmpo helped Greece qualify for its first games since 2008.Greece, positioned within the group that is considered the hardest in the Olympic field, will next play Spain at 4 a.m. CT. July 30, followed by a clash with Australia at 6:30 a.m., August 2.