PHOENIX -- Kevin Durant left shortly before halftime of the  Phoenix Suns' 104-93 NBA Cup win over the  San Antonio Spurs on Tuesday because of a sprained left ankle, and Suns coach Mike Budenholzer said his team's medical staff planned to reevaluate the star forward Wednesday morning. "I think he stepped on somebody's foot in transition, and I think at halftime it stiffened up," Budenholzer said. "We will have to evaluate him again in the morning, see how he feels coming out of it, see how he does overnight. I don't really know a whole lot more than the report at halftime." Sprinting downcourt in transition with 4:30 left in the second quarter, Durant drove to the basket and attempted to cut between Spurs defenders Julian Champagnie and Devin Vassell. Durant stepped on Champagnie's left foot as he rose to take a shot. Durant immediately fell to the floor, landing flat on his back before grabbing at his left ankle. ...