Manchester, Jan. 15 -- : Manchester United manager Ole Gunnar Solskjaer hailed 'professional' Marcus Rashford and said that the 22-year-old is 'raring to go again'.

Rashford was substituted before the hour mark during a clash against Norwich City on Saturday.

"Yeah, he's fine. Marcus is a young boy that I don't want to use too much for his own benefit, because you don't want to burn him out. But he's so energetic and professional and he's raring to go again," the club's official website quoted Solskjaer as saying.

Manchester United registered a 4-0 win in the Premier League match against Norwich City with Rashford scoring twice in the game.

Solskjaer said Rashford is working on his penalties.

"He's still working on his penalties, his f...