Chelsea boss Mauricio Pochettino admits Mykhaylo Mudryk still has much to learn.
Pochettino started the 100m signing for Sunday's 0-0 draw at Bournemouth.
Afterwards, the manager said: "He is improving.
"He still needs to learn; the Premier League is very fast, the speed of the game is so fast.
"I think it's about understanding the game better, try to be more connected sometimes with the team. We need to give the time and to give the tools for him to improve during the season."
