| American Airlines Center20,181 | 18–9 |-bgcolor=ccffcc | 28 | December 20 | @ Philadelphia | | Tim Hardaway Jr. (27) | Kristaps Porziņģis (18) | Jalen Brunson (7) | Wells Fargo Center20,778 | 19–9 |-bgcolor=ffcccc | 29 | December 22 | @ Toronto | | Jalen Brunson (21) | Kristaps Porziņģis (12) | Jalen Brunson (9) | Scotiabank Arena19,800 | 19–10 |-bgcolor=ccffcc | 30 | December 26 | San Antonio | | Luka Dončić (24) | Maxi Kleber (12) | Luka Dončić (8) | American Airlines Center20,427 | 20–10 |-bgcolor=ccffcc | 31 | December 28 | @ Golden State | | Luka Dončić (31) | Luka Dončić (12) | Luka Dončić (15) | Chase Center18,064 | 21–10 |-bgcolor=ffcccc | 32 | December 29 | @ L. A. Lakers | | Luka Dončić (19) | Dwight Powell (11) | Luka Dončić (7) | Staples Center18,997 | 21–11 |-bgcolor=ffcccc | 33 | December 31 | @ Oklahoma City | | Luka Dončić (35) | Maxi Kleber (14) | Luka Dončić (7) | Chesapeake Energy Arena18,203 | 21–12 |-bgcolor=ccffcc | 34 | January 2 | Brooklyn | | Luka Dončić (31) | Luka Dončić (13) | Luka Dončić (7) | American Airlines Center20,289 | 22–12 |-bgcolor=ffcccc | 35 | January 4 | Charlotte | | Luka Dončić (39) | Luka Dončić (12) | Luka Dončić (10) | American Airlines Center20,327 | 22–13 |-bgcolor=ccffcc | 36 | January 6 | Chicago | | Luka Dončić (38) | Luka Dončić (11) | Luka Dončić (10) | American Airlines Center20,238 | 23–13 |-bgcolor=ffcccc | 37 | January 8 | Denver | | Luka Dončić (27) | Luka Dončić (10) | Luka Dončić (9) | American Airlines Center20,314 | 23–14 |-bgcolor=ffcccc | 38 | January 10 | L. A. Lakers | | Luka Dončić (27) | Dončić, Marjanovic (10) | Luka Dončić (7) | American Airlines Center20,542 | 23–15 |-bgcolor=ccffcc | 39 | January 11 | Philadelphia | | Dončić, Powell (19) | Dwight Powell (12) | Luka Dončić (12) | American Airlines Center20,244 | 24–15 |-bgcolor=ccffcc | 40 | January 14 | @ Golden State | | Dwight Powell (21) | Boban Marjanovic (11) | Jalen Brunson (5) | Chase Center18,064 | 25–15 |-bgcolor=ccffcc | 41 | January 15 | @ Sacramento | | Luka Dončić (25) | Luka Dončić (15) | Luka Dončić (17) | Golden 1 Center17,029 | 26–15 |-bgcolor=ccffcc | 42 |