The Leverkusen team has been performing well since the start of the season. We thought maybe towards the end of the season we would see a decline in Leverkusen's performance. But we haven't seen that. The team has been consistently performing well in every match since the beginning of the season. And did not lose a single match. In addition to winning the Bundesliga title, the Leverkusen team is on the way to winning the Europa League title. Leverkusen team is going to make new history.
Xabi Alonso will stay with Leverkusen next season. Leverkusen have consistently performed well this season thanks to Xabi. Leverkusen also performed well against big teams due to excellent match strategy. So our expectations will be high from this team in the next season as well.
I don't think anyone really thought that because Leverkusen didn't have a single weak game the entire season. It was more about the incredibility that a team could go a whole season without losing a game in any of the competitions. And there is good reason to believe that no team can do it because no team has ever done it!

Pretty simple. But considering the quality of their gameplay, I can't remember a game where I thought this is weak or now they deserved to lose. They have had many close calls with late minute equalizers and winning goals, but it wasn't like they were behind because their opponent was better.
There are now three games to go for them. Last Bundesliga game, DFB Cup and the Europa League final. I don't know if there has ever been a team in Europa that did indeed not lose a single game until the very end in all three competitions. Winning the treble, yes teams did that, but did they do so without a defeat?