Chelsea boss Frank Lampard has a warning for youngster Callum Hudson-Odoi.

The Blues were successful in the Carabao Cup, beating Grimsby Town 7-1 and booking a fourth round home tie with Manchester United.

Lampard spoke about the impact of Hudson-Odoi, who wants to play more games in the Premier League.

He told the club's website: "In the first half. With Callum and Christian Pulisic as wingers, the message was to hurt the Grimsby line and run in behind and end up in areas inside the box where you are taking people on.

"It wasn't happening and at half-time the message had to be reinforced pretty strongly. In the second half we managed to get in better positions.

"Callum's talent means he has to work hard to run behind people, to get at people and be inside and outside and work off the ball. That is where he needs to learn, because if he wants to be in the team week in week out that is what he will have to do."