The Juventus team is now taking every match very seriously. Because Juventus don't want to make any more mistakes. Currently there is no such thing as a weak team, every team is capable of building their own. That's why Juventus will never take Sporting team lightly.
I am not sure Juventus can split their focus perfectly for this session, because when I look they are still on unstable at the moment, their schedule is very busy on Seri A, and also have a semifinal Copa Italian cup, Juventus are just growing up and still need time for recovery which I think they still not ready to deal with this busy match on europa.
They will face Sporting Lisbon. The first match will be played in Italy. I think confidence in Juventus has increased lately. I am one of those who trust Juventus like everyone else. Juventus has the power and squad quality to beat Sporting Lisbon. Even though Lisbon was a tough team, they had a good luck with Arsenal and they won. The same may not happen against Juventus.