Mendilibar's time has ended at Sevilla recently and Diego Alonso has been appointed to the manager position. Sevilla have started to change their manager very often in the recent times. Sampaoli, Mendilibar and now Diego Alonso... I don't believe this is a good action to take for a team.
Because the system mostly changes and the players have to adapt to the new one every time. They have to get along with the new manager as well. Rather than that I think Sevilla should have given it some time. They won the Europa League title with Mendilibar in the end.
I think Sevilla should not rush in sacking Jose Luis Mendilibar. Because Mendilibar was actually an important figure who brought big changes to the Sevilla squad last season. Sevilla even avoided the relegation zone in Laliga and managed to win the Europa League title with Mendilibar.
Even though Sevilla haven't shown a good performance this season, I still think that giving more time to Jose Luis Mendilibar would be much better. Because currently Sevilla also has an important match in the Champions League. And of course changing the current coach is a bad decision.
Even if Diego Alonso could become a good coach for Sevilla, improvements will not occur instantly. Everything definitely requires adaptation and is quite a long process. And actually, Sevilla currently doesn't have enough time to adapt to a new coach. Because a busy match schedule and a change of coach will only make things worse.
Sevilla in the Champions League currently has not experienced a defeat nor has they won. Two matches only ended in draws. And I think that's still quite better than losing. But I'm also curious whether Diego Alonso will really make a drastic improvement in Sevilla's performance or if it will actually get worse. Let's see.