Manchester United boss Ole Gunnar Solskjaer was delighted for Mason Greenwood after victory at Aston Villa.
Greenwood struck in the 3-1 win.
"Thursday night he worked his socks off and then he's going again and he's tired," said Solskjaer. "His body is not really filled out yet and he might not be ready for all of these games, but he's got something special.
"The kid just turns the game around in one split second and the goal (at Villa) was excellent. I'm delighted that he's got back to his goal scoring best.
"I can say that Mason is learning all the time. He's learning on the job which isn't easy. He's had to bear a lot of responsibility and he's popped up with so many important goals for us."