Greenwood scored in a 4-0 pre-season win over Leeds and boss Ole Gunnar Solsjkaer says he could start in the Premier League opener against Chelsea next month.

"He is quite laid-back," said Rashford. "I think it's no good putting things in his head repeatedly. He's a clever kid so he'll learn it as he goes. His natural abilities are frightening."

England forward Rashford, 21, added: "The manager is obviously doing a good job in sort of guiding him in the right direction and the more you do that, his talent will just come through."

England Under-18 forward Greenwood made his United debut in March's Champions League comeback win over Paris St-Germain and has made three league appearances.

His goal against Leeds in Perth was his first for the senior team.

The teenager's chances of a starting spot against Chelsea could be helped by the uncertainty over fellow forward Romelu Lukaku, a reported target for Inter Milan.

"Mason has a chance to start against Chelsea [on Sunday, 11 August], definitely. He is more than capable," said Solskjaer.

"It is a good possibility if he keeps going as he does. It is difficult to keep players out who perform well.

"[I was] delighted with the goal he scored. That first goal is a weight off his shoulders.

"With his movement, cleverness, he's going to be a very good player. He's a natural footballer who can play anywhere along the front line."