Lampard says he should follow the lead of Callum Hudson-Odoi.
“I spoke to Christian two days before the Grimsby game and was very clear about the standards. And we have to give him the fact he has moved country, leagues and is as young as all the young players we are talking about.
“He has just turned 21. So if anyone is getting too excited about this, they should calm down, frankly, because he has already started five games for us.
“What he needs to do is work daily, and work to show within the group that he deserves to play – as all the players do.
“I've been really pleased with Callum's response to criticism and that has to continue.
“We can all focus on Pulisic, but Callum's the same. I have to speak in the real world when I speak to them."