Chelsea fullback Ben Chilwell admits he's told Mykhaylo Mudryk he must improve this season.
Chilwell says the 100m must do better after his first six months in England.
He told football.london: "Yeah. With Mischa I just see endless bags of potential that hasn't been fulfilled yet.
"I've told him that, I'm not just saying that. I've told him he hasn't fulfilled that yet for one reason or another. I literally had a conversation with him today after training in the changing room, because he's been on fire the last few days and obviously was on fire in the game against Brighton and I just said he needs to keep that up now for the whole season.
"We all see how good he is and he just needs to keep up what he's been doing,"