The second leg will be played at servette home and if you look at the difference in the quality of the two teams of course there will be no difference for Chelsea to play home or away at the moment, Chelsea managed to win the first leg with a score of 0-2 and I think the victory will not make them just stay in the that match, Chelsea performance in the match against Wolves is impressive and it looks like players like Nkunku and Madueke will show their ability again In scoring goals in the match, I think the match will be an easy match for Chelsea and even more likely they can score a lot of goals if we look at Chelsea previous performance, the second leg will be played at the home of Servette but I think it will not give them an advantage to be superior to Chelsea.
Chelsea are now on top to win the match again in the second leg, especially with the advantage they got in the first leg, it will certainly make their confidence even better. And you are right, if they can play like the previous match where they were able to beat Wolves FC with a very convincing score, then it is not impossible that they will do the same in this match too. However, the opportunity is very open for them. They will also certainly realize that they are getting a lot of attention lately, following their very worrying performance in the last few seasons. They also certainly want to show that this season they can be much better and are ready to provide competition in all competitions they play.