It should not have been so difficult if one of Roma's players did not get a red card because we can see how the match went in the first leg. Roma started to lose concentration to match Athletic Bilbao's game after their player got a red card so their strength was no longer balanced. In that match Athletic Bilbao attacked in full composition so it was difficult for Roma to stop their movement.
Several teams that qualified for the next round have the same chance and I think almost all of them will do their best to maintain their chances of qualifying for the final. This will be a very tense match and we will see how Manchester United can beat the opponents they will face in the future.
Athletic Bilbao is a strong team and they have even been considered since the beginning because of the good performance that Athletic Bilbao has shown in La Liga this season so winning against Roma is a natural thing apart from the red card received by the Roma player so that it makes it easier for Athletic Bilbao to win the second leg match but indeed from the beginning I thought the percentage of Athletic Bilbao to be able to turn things around is very large so this is not a surprise that happened.
Of all the teams that qualified for the quarterfinals, they should be wary because they have very even strength and in the Europa League the competition is also very fierce but Athletic Bilbao is one of the favorite teams this season in my opinion because their performance that has been shown since the beginning of the season is quite strong and consistent.