Chelsea boss Lampard warns players: We must be absolutely switched on for Sevilla | OneFootball

Chelsea boss Frank Lampard says they must be mentally switched on ahead of their Champions League opener against Sevilla.

For a number of Blues, last season's Champions League campaign offered them their first taste of elite European football. The run ended at the round of 16 stage, as they were emphatically beaten over two legs by eventual winners Bayern Munich.

"The players that were here last year, and talking about the young players particularly in the Bayern Munich games because of the strong opposition, it would have been a learning curve for them," noted Lampard.

"That's the Champions League; it's the top club competition in world football. They will be better for it; they will want to improve this year in that. We will see how much they have learned.

"Of the players we have brought in, some have more Champions League experience than others," added Lampard.

"We generally have younger players so it's important we try and make sure we learn any lessons as we go because the Champions League is so cut-throat.

"You have to have absolute focus because of the level of teams you're playing, and particularly as we start against Sevilla."