The last time these two teams faced each other was in the 2015-2016 champions league when they had a draw in the first leg and Roma won the game in the second game with a 3-2 result, now they are playing in the Europa League but this time according to the last games we saw from both teams I think Leverkusen got higher than to win this game however Roma got an experienced coach like Guardiola.
It's been quite a while and can't be used as a benchmark for them now.
The two teams still have to analyze how they and their opponents are currently performing because both are clearly different now with new schemes and games.
Everyone has the same chance but in terms of enthusiasm, of course Xabi now has to be even more enthusiastic because this is an opportunity for him to develop himself as a coach.