There are also many strong competitors in the Europa League, so, although Barcelona may be one of the candidates, this doesn't guarantee that they will be the champion. It is not easy to defeat many competitors there. Xavi needs to make certain strategies that will be more effective in fighting every team in Europe League. Moreover like Arsenal, Lazio, Juventus, Man United, and others.
Indeed. Barcelona may be one of the favorite teams to win the Europa League title. However, Barcelona seems not really well when they are playing in international matches. In the last season, they failed to reach the final, they are defeated by a smaller team. Man United, Arsenal, Ajax, and Juventus probably will be strong opponents for Barcelona. On the other hand, smaller teams like Lazio, Real Betis, Real Sociedad, or Monaco can defeat Barcelona as well, if they are not seriously to plan a proper strategy against them.