Washington lost 15 of its final 19 regular season road games, but has won seven of eight away from home in the playoffs over the past two years.
CAVALIERS 99, CELTICS 91
James scored 15 points in the fourth quarter, moved past Hall of Famer Jerry West on the career playoff scoring list and made sure the Cavs didn't slip up at home. He and Irving combined for all of Cleveland's 24 points in the final period.
Game 3 is Thursday night in Boston.
ROCKETS 111, MAVERICKS 99
The Mavericks scored the first four points of the fourth quarter to take a three-point lead. But with Harden on the bench, Houston scored the next 11 points, powered by three alley-oop passes from Smith to Howard, to take a 92-84 lead with about 8 minutes left.
Smith finished with 15 points, nine assists and eight rebounds.
Monta Ellis had 24 points for Dallas, which hosts Game 3 on Friday night.