Wall scored more than 30 points for the third straight game for the first time in his career, with his 13 fourth-quarter points coming in the final 4:40 to help Washington hold off Los Angeles. Wall was 10 for 18 from the field and made 11 of 12 free throws.
Nene surpassed his previous career best by two points on 13-for-22 shooting from the field. Martell Webster added 20 points with four 3-pointers.
Jordan Farmar led the Lakers with 22 and Pau Gasol had 17.
At Toronto, Andray Blatche scored 24 points and Joe Johnson had 21 as the Brooklyn Nets ended a five-game losing streak by beating the Raptors 102-100.
Paul Pierce scored 16 points and Kevin Garnett had 12 as the Nets won for the first time since beating Phoenix on Nov. 15.
DeMar DeRozan scored 27 points and Kyle Lowry had 21 for the Raptors, who lost a two-game winning streak.
The Golden State Warriors ended a three-game losing streak by defeating the New Orleans Pelicans 102-101 after Klay Thompson scored 22 points and equaled a career high with eight assists.
Eric Gordon had a chance to win it for New Orleans with an open 3-pointer from the left corner in the final seconds, but the shot rimmed out and Anthony Davis couldn't quite reach the rebound.
Ryan Anderson had 21 points and 12 rebounds for New Orleans. Davis finished with 14 points and 11 rebounds.