Jürgen Klopp previewed Liverpool's Champions League clash with Napoli.

"Arthur needs now just football - and training, especially, that's how it is. He wasn't in team training for a while at Juve, so he needs proper team training - and that's what we are doing with him. Can he play minutes? Yes. Should he play a full game? No, because he needs to get used to the intensity in each competition. It's not like in the Champions League you have to work less than in the Premier League. Not at all, especially not here. He is doing well, he is really giving his absolute all in training, we have to be careful with him as well and then we will see whether we can use him.

Sure, we haven't won here, with Dortmund not, with Liverpool not. But I am not sure, we quite frequently qualified for the Champions League final after Napoli was with us in the group stage. I am not sure if all the time, but maybe twice if I am right, with Dortmund and one year with Liverpool as well. But, who cares? How we say in Germany, I'm a late bloomer; I always need a little bit longer to achieve my stuff and that means sometimes I have to try two times, sometimes three times, sometimes four times - and Napoli [could be] four times, obviously. What do we have to do? Play better than in the previous three games, that would be very helpful because we didn't play particularly well when we came here. One reason is because Napoli are pretty strong".