Wallabies coach Michael Cheika has the need for speed, and he has ordered winger Drew Mitchell to develop it too.
Mitchell was a surprise omission from the Wallabies' squad for Saturday night's Rugby Championship clash with Argentina in Perth.
The 32-year-old returned to Test action last week following a long lay-off from a groin injury, coming off the bench to play a small role in the 23-17 win over South Africa in Brisbane.
But Cheika wasn't overly satisfied with the performance, and he wants Mitchell to boost his speed.
"He pulled up ok after the game. I just want him to go a bit faster, a bit better," Cheika said.
"That's something he's got to work through in his training program, so he can get that up to the level.
"Argentina have got excellent outside backs here, so everyone out here has to go at full tilt.
"He could have been selected. But I've just made a decision based on what I've been seeing at training."
Henry Speight is a chance to make his first Wallabies appearance since last year's World Cup after being named on an extended bench.
Cheika will decide on Friday whether Speight makes the cut.
"I've liked what Henry's brought since he's come back," Cheika said.
"He's aggressive and runs hard.P
"Henry's form in 2014 was untouchable in Super Rugby. He has that feel about him (again).
"He's got that fitness under his belt from playing in the Sevens, and he's getting back to the right size.
"I've liked his attitude, so I want to give him an opportunity."
Prop Tom Robertson will make his debut off the bench, and Melbourne Rebels star Lopeti Timani is also set to earn his first cap.