Cooper Flagg and the Dallas Mavericks locked horns against the Phoenix Suns on Wednesday. It was the franchise's first game after general manager Nico Harrison was relieved of his job. Anthony Davis remained sidelined once again, with Flagg leading the starting lineup, which also featured P.J. Washington, Max Christie, Brandon Williams and Daniel Gafford.Flagg delivered a strong all-round performance, but the Mavericks fell to a 123-114 loss at home. The Mavericks rookie excelled on defense and dominated the boards, while also showcasing impressive playmaking ability.Cooper Flagg finished the game with 16 points on 6-of-15 shooting, including 3-of-7 from 3-point range, and 1-of-4 from the free-throw line. He also recorded six rebounds, six assists, three steals and two blocks in 34 points. The rookie committed four turnovers and registered a -9 rating.Cooper Flagg Highlights vs. Phoenix Suns (Nov. 12)It was a slow start for the No. 1 pick on offense as he struggled to find his shooting rhythm in the first quarter. The former Duke phenom launched five shots in the frame but could successfully make only one. Defensively, however, the 6-foot-9 forward was a demon, breaking up several plays with his activity and hustle. He had two steals and one block in the opening period.The Mavericks rookie was significantly better efficiency-wise in the second quarter. He scored five points in the frame, shooting 2-of-4 from the floor, including knocking down his first three of the night.At halftime, Cooper Flagg had seven points on 2-of-9 shooting, including 1-of-3 from beyond the arc. He also recorded five rebounds, four assists, two steals and two blocks in 16 minutes.Flagg was fantastic after the halftime break, despite the Mavericks struggling to keep up with the Suns. The standout rookie made all three shots, including two from beyond the arc, and stuffed the stat sheet by dominating in every facet of the game.Flagg was relatively quiet in the final period, failing to make even a single shot from the floor. He only scored one point in the period, which came from the free-throw line.