Manchester United manager Jose Mourinho told Luke Shaw he would have to earn his chance, urging the full-back to learn from Henrikh Mkhitaryan.
England international Shaw was left out of the United squad to face Saint-Etienne in the second leg of their Europa League last-32 tie.
"He stayed behind in Manchester because I'm playing with Daley Blind, with Marcos Rojo, with Matteo Darmian, and all of them are playing the way I like a full-back to play," he said.
"Luke has to wait for his chance and work better and better, knowing I give nothing for free.
"When I give something to the players, it's expensive for them – it's not cheap.
"They have to work hard every day, they have to play well, so he has to wait. And, at this moment, he's behind the others."
"Potentially, he [Shaw] has many things that I like but one thing is potentially, another thing is on the pitch to express all the qualities that I like a player to express," Mourinho said.
"And he has to keep working, like Mkhitaryan did for a long time."
