Saturday's game will be their seventh-straight fixture away from home, with last night's 102-93 defeat to the Brooklyn Nets being their third loss of their current away run.
The point guard told reporters: "We've got to put everything into that game. We're going to DC. Washington is a team that's been playing well.
"We've got to win it. It's early in the season but it's a must-win for us so that we can at least feel somewhat decent for this trip."
The Clippers currently lead the Pacific Division.