Cooper Flagg once again led the Dallas Mavericks' charge as Anthony Davis remained sidelined for the NBA Cup game against the Memphis Grizzlies on Friday. The Mavericks stuck with the same starting lineup from the previous game, with Flagg, D'Angelo Russell, P.J. Washington, Max Christie and Daniel Gafford taking the court first.Flagg's NBA Cup debut didn't turn out the way he would have imagined. The Mavericks suffered a 118-104 hammering on the road, while Flagg only had one good quarter in the game.In the end, Cooper Flagg finished with 12 points, six rebounds, two assists, one steal and one block in 27 minutes. He shot 5-of-10 from the floor, including 1-of-4 from 3-point range, and 1-of-2 from the free-throw line.Cooper Flagg Highlights vs. Memphis Grizzlies (Nov. 7)The Mavericks endured another rough start, and Flagg's lack of assertiveness didn't help their cause. The former Duke standout remained scoreless in his first five minutes on the court. He didn't even record a field goal attempt before heading to the bench for his first rest of the game.After checking back into the game, Flagg missed one of his two free throws but ended the first quarter with zero shot attempts. He recorded one rebound, one assist and one steal.The Mavericks rookie came out all guns blazing in the second quarter and put up two shots in the opening minute. He misfired on both occasions, but his aggressiveness was heartening to see for Dallas supporters. The 6-foot-9 forward was successful in knocking down two of his next three attempts, including a 3-pointer.Cooper Flagg pushed his tally to 10 points at halftime, but the Mavericks fell into a 74-51 hole. The rookie had two rebounds, two assists, one steal and one block after 16 first-half minutes.The Mavericks forward added just two more points to his tally in the third quarter. Dallas continued to struggle on both ends of the floor, with the Grizzlies pouncing on every opportunity to extend their lead. He remained quiet in the final period as well, failing to score even a single point.