In fact, Sevilla's performance was good but not well enough to beat a strong team like Manchester United, they focused on this match because the Europa League in their only hope but I think the reason why they won the game was the bad performance of Manchester United against them that's why if Juventus don't do the same mistake they won't have a hard day against Sevilla.
I think Juventus are well aware of that at this point because they are already in the semifinals of the Europa League this season so it will be very detrimental if Juventus are not focused and consistent to win and go to the final. Because if for example Juventus can make it to the Europa League final this season, Juventus will also not face such a strong team in the final because AS Roma and Leverkusen are also teams whose performances have been mediocre this season.
I personally don't see much improvement in the Juventus team. They did not perform well in previous matches. Couldn't do very well with Sporting. Also lost 1-0 to Inter. Juventus team should bring some tactical changes.