England midfielder Eric Dier called for calm around Ruben Loftus-Cheek, urging people not to get "too carried away".
Loftus-Cheek produced an impressive performance on his senior debut for England in a 0-0 friendly draw against Germany at Wembley on Friday.
"Everyone's known about Ruben's potential for a long time," the Tottenham star said post-game.
"It's great that he’s now playing regular football week in, week out at Crystal Palace. That can only allow him to fulfil his potential. Hopefully this [his international debut] is another step in his progression.
"There's so much more to come from him, but there's no point getting too carried away at this point. He's a good boy and he still has a lot to work on, like all of us."
Loftus-Cheek has already made six Premier League starts for Palace — the same number he managed in three seasons at Chelsea.
Dier liked what he saw from the midfielder against Germany, praising his approach against the world champions.
"He showed a great attitude, willing to get on the ball anywhere, with the confidence to do that and that's fantastic and great to see," he said.
"Ruben is a big boy. He's been the same since he was 12 I think. He's strong, he's got great physicality, he moves the ball really well.
"There's fantastic potential there and hopefully he keeps working hard to fulfil it."