I think that you are expecting too much from Roma when yoj can see that De Rossi is still having problems of improving the club's performance since the season started. This was bow we said that Roma is among the favorite last season but was kicked out of the league by Atalanta. Roma woll be playing at home is not a guarantee that they will win the match. Bilbao shouldn't be underestimated because they are in a good performance since the season started.
Normally i always like the performance of Roma but now I can't rely on them because they can easily disappoint and beside is only a team that has a strong zeel of wining people can rely on but definitely not Roma at the moment and secondly that match will be there first match of the Europa league stage and one thing I no about first matches is that it can be very tough to predict, though I really don't no if there would be a positive improvement on Roma but we are still uncertain but in the aspect of Bilbao they always maintain a good results but we cannot also be sure that they are the best suitable to win there match against Roma, I'm sure this is the kind of match gamblers wouldn't like to risk there money on.
I concur, at present Roma are hard to bank on because of inconsistency in their performance. At times, they pull out remarkable performances; more often, though, they let one down. Besides, a team's first Europa League match can be daunting to foretell since there exists pressure and adaptation effect that has to take its toll on the team.
Bilbao, on the other hand, is more stable in performance but does not guarantee winning against Roma. Both teams have strong points and weak points; this makes the race very hard to predict.
To gamblers, games such as this one are indeed very risky for there is no assurance of who would win. Therefore, being keen on staking in hard-to-foretell matches is a caution that is good.