In the NBA regular season, the Mavericks defeated the Raptors 139-129 and won their first victory of the season.

In this campaign, Flagg played 29 minutes, making 8 of 14 shots, 2 of 6 three-pointers, and 4 of 4 free throws. He scored a new high of 22 points, plus 4 rebounds, 4 assists, 1 block and 0 turnovers, with a plus-minus value of +5.

According to statistics, Flagg (18 years and 309 days old) became the fifth youngest player in the NBA to score 20 points in a single game. The details are as follows:

1. O'Neal Jr.: 18 years and 101 days

2. Kobe: 18 years and 133 days

3. Tracy McGrady: 18 years and 265 days

4. James: 18 years and 303 days

5. Flagg: 18 years and 309 days