NBA fans expect certain teams to give the undefeated Golden State Warriors a tough game, though it's unlikely they envision those clubs coming from the Atlantic Division. After the Atlantic leaders again took the defending champions right down to the wire, the Brooklyn Nets take another shot at handing the Warriors their first loss Sunday and ending the best start to a season among America's four major pro leagues. Golden State improved to 21-0 with a 112-109 win in Toronto on Saturday that had its share of tense moments and was eerily reminiscent of a Nov. 17 home win over the Raptors.