SAITAMA, Japan—Luka Doncic and Slovenia need one win for a medal in their Olympic basketball debut. Wins are all Doncic ever gets when he wears his country’s uniform. Doncic had 20 points, 11 assists, and eight rebounds, and Slovenia beat Germany 94–70 on Tuesday in the opening game of the men’s quarterfinals. Zoran Dragic got Slovenia off to a fast start by making his first six shots and finished 11 for 13 en route to his 27 points. Doncic is the unquestioned star of the Slovenians—maybe of the entire basketball tournament. But all the attention he draws means opposing defenses have to leave other players open and Doncic is happy to give them the ball. “He’s the team leader,” Dragic said. “We know that and we accept that, but we have so much weapons on our team and it’s easy to play with him because when he plays, like three …