Luka Dončić (age 19.8 years) guarded by Paul George. Luka went 25p-7a-3r during a narrow Mavs 105:103 win over the Thunder, despite Paul George erupting with 36p-0a-5r (read recap here). However, this time it was teammate Dennis Smith Jr who had key plays in the clutch that helped secure the win, but it was Luka's 'anklebreaker' on George that got all the headlines the next day.
Source: ABS-CBN.com