Cooper Flagg led the Dallas Mavericks' charge against the Washington Wizards on Friday. The No. 1 pick was in the starting lineup along with P.J. Washington, Klay Thompson, Anthony Davis and Dereck Lively II. Flagg endured an underwhelming NBA debut and struggled in the Mavericks' previous game. He entered the Wizards game with all eyes perched on him once again.Flagg came out with a strong first-quarter performance, but his production and efficiency dropped in the second and third periods. The rookie delivered a huge fourth-quarter performance and did all he could to will Dallas to a win. His efforts weren't enough as the Mavericks suffered a 117-107 loss.In the end, Cooper Flagg finished with 18 points on 6 of 14 shooting, including 2 of 5 from beyond the arc, and 4 of 4 from the free-throw line. He also recorded five rebounds, six assists, one steal and one block in 35 minutes. He committed five turnovers and recorded a -6 plus/minus rating.Cooper Flagg Highlights vs. Wizards (Oct. 24)The former Duke phenom gave an excellent account of his talent in the opening period. The 6-foot-9 forward knocked down his first NBA 3-pointer when he walked into a three and confidently swished the shot. The highlight was his playmaking as the rookie looked comfortable and disciplined while orchestrating the team's offense.Flagg dished out three assists in the opening period alone. He also scored three points on 1 of 2 shooting, including 1 of 1 from 3-point range, and pulled down one rebound.Cooper Flagg went slightly cold in the second period and missed three of his four shot attempts from the floor. His poor offensive production played a role in the Mavericks losing their lead and handing the momentum to the Wizards.At half time, Flagg had five points, two rebounds and four assists in 16:30 minutes. He shot 2 of 6 from the floor, including 1 of 3 from beyond the arc, and 1 of 1 from the free-throw line.Flagg struggled to make an impact after the half time break. He attempted three more shots in the third quarter and made just one. Turnovers also started to mount slowly for the rookie, who turned the ball over three times in three quarters combined.Cooper Flagg tried his best to will the Mavericks to a comeback win, but his gallant-hearted fourth-quarter effort went in vain. The Mavericks came within striking distance after the rookie dropped 11 points in the final period, but couldn't close out the Wizards and suffered their second consecutive loss.