"We defended for four quarters consistently ... but you also have to take into account that you caught him on a night when things would not fall for him," Fratello said after Memphis' 95-80 victory Friday night.
It was Washington's seventh straight loss on the road.
But Arenas, who came in ranked fourth in the NBA in scoring, was little help for Washington, going 1-for-12 from the field. He had a dunk with six minutes left and hit one of two free throws with 2:35 to go.
"I was just missing shots," Arenas said. "It was just one of those nights. They come and they go."
The Wizards return to Washington for three games, and Arenas said he'll be happy to be home.
"We can catch some momentum before we go on the road again," Arenas said. "It will be a good test for us. We're getting tested right now."
The Grizzlies are also winless on the road.
Memphis got 15 points from Chucky Atkins, 11 points and 10 rebounds from Stromile Swift and 14 points each from Dahntay Jones and Mike Miller. Jones helped Memphis to a 31-18 scoring advantage among the reserves.
"We try to spark up the bench and add something to the game," Jones said. "And we got a chance to do that tonight."
The Grizzlies' Atkins was modest about his part in guarding Arenas.
"It's hard to defend a player like him. He just missed shots," Atkins said. "I don't really think it was anything we did."
Washington trailed 58-55 with 3:07 left in the third period after a layup by Jamison, but the Grizzlies put together a 10-2 run and entered the final period up 68-59.
Jamison opened the fourth quarter with five straight points and brought the Wizards to 68-64, but they could get no closer.
The Grizzlies led by 12 points in the second quarter before settling for a 41-37 halftime advantage.
- Memphis G Kyle Lowry missed the game after breaking his left wrist against Cleveland on Tuesday, and coach Mike Fratello indicated he could be out most of the season.
- Memphis G Eddie Jones missed a sixth game with right Achilles' tendinitis.
- Washington C/F Michael Ruffin was out with a sprained right foot.
- The Grizzlies won both games with the Wizards last season. Memphis F Pau Gasol, who has yet to play this season after breaking his left foot with Spain in the World Championship, had a then career-high 39 points against the Wizards last February.