Dallas Mavericks rookie and No. 1 NBA Draft pick Cooper Flagg contributed 10 points, six rebounds and four assists in 32 minutes in his Las Vegas Summer League debut Thursday as the Mavericks edged the Los Angeles Lakers 87-85. Flagg added three steals and a block. He went scoreless during the second half and finished 5-for-21 from the floor. “Not up to my standard, but I’m going to regroup; I’m going to be all right,” Flagg told ESPN postgame. “This is a new feeling, new environment, new teammates, but the guys settled down.” Lakers second-year guard Bronny James missed a potential go-ahead trey in the closing seconds. Los Angeles’ Cole Swider led all scorers with 22 points to go with 10 rebounds. Ryan Nembhard paced Dallas with 21 points and Miles Kelly followed with 17. The main attraction, though, was undeniable. Fans at the Thomas & Mack Center buzzed when Flagg got touches as well as during his early, sporadic defensive matchups against James, who scored his team’s first five points and finished wi
