Dallas Mavericks rookie sensation Cooper Flagg didn’t need anyone to tell him his first half was rough; he knew it the moment he walked into the locker room. After going scoreless through the first two quarters of his NBA debut, the 18-year-old admitted that he made a conscious decision to come out with a new mindset in the second half.

“I just wanted to be more aggressive,” Flagg said after the Mavericks’ 125-92 loss to the San Antonio Spurs on Wednesday night.

That shift in mentality paid off. Flagg scored all 10 of his points in the second half, finishing with a 10-point, 10-rebound double-double in his highly anticipated debut. Although he shot just 4-of-13 from the field and committed three turnovers, the rookie showed flashes of the versatility that made him the No. 1 overal

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