The 18-year-old earned his first call-up to England’s senior squad following his impressive finish to United’s season and made his international debut on Saturday evening as Gareth Southgate’s side edged to a 1-0 victory over Iceland.
Greenwood scored 17 goals for United in all competitions last season and Walker, who was sent off against Iceland, says the young forward has looked sharp whilst working with England’s squad.
‘It’s brilliant for English football,’ he said.
‘Obviously, Phil [Foden] was involved in the World Cup win for the Under-17s. They’re proving it at club-level, with big clubs, so I’ve said it before the world is their oyster, especially for Phil.
‘For Mason, I’ve not seen much of him, but he seems to be a very good player. He’s sharp, and he can finish – I’ll tell you that – I’ve seen him in training.’
Meanwhile, Gareth Southgate admits he felt ’embarrassed’ after he had to ask Greenwood to name his preferred foot.
‘I have to say it is really rare to see a player as comfortable with both feet – not just in terms of the ability to receive and pass but finishing with both feet,’ said the England manager.
‘There aren’t many that I have seen.
‘With him, the quality of finishing, the way he’s got this icy cold stare, very calm disposition generally, which I think is clear when he’s in and around the penalty box.
‘For somebody of his age, that’s remarkable maturity.’