section_path: Professional career/Dallas Mavericks (2018–2025)/First All-Star and playoff appearance (2019–2020)
section_name: First All-Star and playoff appearance (2019–2020)
paragraph_text: First All-Star and playoff appearance (2019–2020)
  
  Dončić made his first triple-double of the season on October 25, 2019, posting 25 points, 10 rebounds, and 10 assists to help the Mavericks defeat the New Orleans Pelicans 123–116. In two consecutive games, on November 1 and 3, he recorded two triple-doubles and matched a career-high 15 assists in both games. On November 8, Dončić scored a career-high 38 points and recorded his twelfth NBA triple-double by adding 14 rebounds and 10 assists in a 106–102 loss to the New York Knicks. Ten days later, in a 117–110 victory over the San Antonio Spurs, Dončić recorded a then-career-high 42 points and his sixth triple-double of the season by adding 11 rebounds and 12 assists. He made NBA history in a 142–94 victory over the Golden State Warriors on November 20, posting 35 points, 10 rebounds, and 11 assists. Dončić became the youngest player to have 35-point triple-doubles in succession, breaking Oscar Robertson 's record. Dončić was the fourth player to do so since the 1983–84 season, joining Michael Jordan, James Harden, and Russell Westbrook. In November, Dončić was named the NBA Western Conference Player of the Week for Week 5 (November 18–24), his first NBA Player of the Week award. On December 3, he won his first NBA Player of the Month award when he was named the NBA Western Conference Player of the Month for October and November. Dončić became the youngest Western Conference Player of the Month winner since the league began issuing the award by conferences in the 2001–02 season. In December, he was named Sports Illustrated 2019 Breakout of the Year. On December 8, 2019, Dončić surpassed the record for the most consecutive games with at least 20 points, five rebounds, and five assists since the ABA-NBA merger in 1976. Michael Jordan previously held the record with 18 straight games in 1989. Dončić recorded his tenth triple-double of the season on January 4, 2020, posting 39 points, 12 rebounds, and 10 assists in a 123–120 loss to the Charlotte Hornets.
  
  During the 2019–20 season, Dončić was selected to his first NBA All-Star Game as a Western Conference starter. Dončić became the youngest European player to start in an All-Star game. On March 4, he recorded his 22nd career triple-double, passing Jason Kidd for the most in Mavericks history. Dončić registered 30 points, 17 rebounds, and 10 assists in a 127–123 overtime victory over the New Orleans Pelicans. He recorded his 15th triple-double of the season on July 31, 2020, posting 28 points, 13 rebounds, and 10 assists in a 153–149 overtime loss to the Houston Rockets. On August 4, Dončić recorded another triple-double with 34 points, 12 assists, and a career-high 20 rebounds in a 114–110 overtime win over the Sacramento Kings. With that, he became the youngest player to record 30-plus points, 20-plus rebounds, and 10 or more assists. On August 8, Dončić had a then-career-high 19 assists, which tied LeBron James for an NBA season high, 36 points, 14 rebounds, and two turnovers in a 136–132 win against the Milwaukee Bucks. The game marked Dončić's 17th triple-double of the season and clinched his spot as the youngest player to lead the NBA in triple-doubles. On August 15, he was selected to the NBA's All-Seeding Games First Team for his play in the eight seeding games, where he averaged 30.0 points, 10.1 rebounds, and 9.7 assists per game. Dončić finished as one of the three finalists for the NBA Most Improved Player award. He finished third behind eventual winner Brandon Ingram and second place Bam Adebayo. On August 17, Dončić made his NBA playoffs debut, scoring 42 points (most ever in an NBA playoffs debut) in a 118–110 loss to the Los Angeles Clippers. On August 23, he became the youngest player in NBA postseason history with a 40-point triple-double, scoring 43 points, including a game-winning, buzzer-beating three-pointer, in a 135–133 overtime victory over the Los Angeles Clippers. With that performance, Dončić became just the second player in NBA history to record at least 43 points, 17 rebounds, and 13 assists in any game, joining Wilt Chamberlain as the other. On September 16, Dončić was named to the All-NBA First Team. He became the first player since Tim Duncan in the 1998–99 season to be selected to an All-NBA First Team in a first or second season. Dončić finished fourth overall in the season's final MVP results. He also became the second-youngest player ever to finish in the top five of MVP voting.
  
  Dončić made his first triple-double of the season on October 25, 2019, posting 25 points, 10 rebounds, and 10 assists to help the Mavericks defeat the New Orleans Pelicans 123–116. In two consecutive games, on November 1 and 3, he recorded two triple-doubles and matched a career-high 15 assists in both games. On November 8, Dončić scored a career-high 38 points and recorded his twelfth NBA triple-double by adding 14 rebounds and 10 assists in a 106–102 loss to the New York Knicks. Ten days later, in a 117–110 victory over the San Antonio Spurs, Dončić recorded a then-career-high 42 points and his sixth triple-double of the season by adding 11 rebounds and 12 assists. He made NBA history in a 142–94 victory over the Golden State Warriors on November 20, posting 35 points, 10 rebounds, and 11 assists. Dončić became the youngest player to have 35-point triple-doubles in succession, breaking Oscar Robertson 's record. Dončić was the fourth player to do so since the 1983–84 season, joining Michael Jordan, James Harden, and Russell Westbrook. In November, Dončić was named the NBA Western Conference Player of the Week for Week 5 (November 18–24), his first NBA Player of the Week award. On December 3, he won his first NBA Player of the Month award when he was named the NBA Western Conference Player of the Month for October and November. Dončić became the youngest Western Conference Player of the Month winner since the league began issuing the award by conferences in the 2001–02 season. In December, he was named Sports Illustrated 2019 Breakout of the Year. On December 8, 2019, Dončić surpassed the record for the most consecutive games with at least 20 points, five rebounds, and five assists since the ABA-NBA merger in 1976. Michael Jordan previously held the record with 18 straight games in 1989. Dončić recorded his tenth triple-double of the season on January 4, 2020, posting 39 points, 12 rebounds, and 10 assists in a 123–120 loss to the Charlotte Hornets.
  
  During the 2019–20 season, Dončić was selected to his first NBA All-Star Game as a Western Conference starter. Dončić became the youngest European player to start in an All-Star game. On March 4, he recorded his 22nd career triple-double, passing Jason Kidd for the most in Mavericks history. Dončić registered 30 points, 17 rebounds, and 10 assists in a 127–123 overtime victory over the New Orleans Pelicans. He recorded his 15th triple-double of the season on July 31, 2020, posting 28 points, 13 rebounds, and 10 assists in a 153–149 overtime loss to the Houston Rockets. On August 4, Dončić recorded another triple-double with 34 points, 12 assists, and a career-high 20 rebounds in a 114–110 overtime win over the Sacramento Kings. With that, he became the youngest player to record 30-plus points, 20-plus rebounds, and 10 or more assists. On August 8, Dončić had a then-career-high 19 assists, which tied LeBron James for an NBA season high, 36 points, 14 rebounds, and two turnovers in a 136–132 win against the Milwaukee Bucks. The game marked Dončić's 17th triple-double of the season and clinched his spot as the youngest player to lead the NBA in triple-doubles. On August 15, he was selected to the NBA's All-Seeding Games First Team for his play in the eight seeding games, where he averaged 30.0 points, 10.1 rebounds, and 9.7 assists per game. Dončić finished as one of the three finalists for the NBA Most Improved Player award. He finished third behind eventual winner Brandon Ingram and second place Bam Adebayo. On August 17, Dončić made his NBA playoffs debut, scoring 42 points (most ever in an NBA playoffs debut) in a 118–110 loss to the Los Angeles Clippers. On August 23, he became the youngest player in NBA postseason history with a 40-point triple-double, scoring 43 points, including a game-winning, buzzer-beating three-pointer, in a 135–133 overtime victory over the Los Angeles Clippers. With that performance, Dončić became just the second player in NBA history to record at least 43 points, 17 rebounds, and 13 assists in any game, joining Wilt Chamberlain as the other. On September 16, Dončić was named to the All-NBA First Team. He became the first player since Tim Duncan in the 1998–99 season to be selected to an All-NBA First Team in a first or second season. Dončić finished fourth overall in the season's final MVP results. He also became the second-youngest player ever to finish in the top five of MVP voting.