Leverkusen are four games away from becoming the first team to go through a Bundesliga season unbeaten.
Josip Stanisic scored in the seventh minute of stoppage time as Bayer Leverkusen extended their unbeaten run to 45 games in all competitions with a 1-1 draw at Borussia Dortmund on Sunday.
After years of heartbreak and being dubbed "Neverkusen" for their string of runners-up finishes, Bayer Leverkusen finally broke through to claim their first-ever Bundesliga title. Their 5-0 victory over Werder Bremen last week secured the trophy, marking a watershed moment in the club's 119-year history. Although they have enjoyed intermittent cup success, this league title signifies a shift in their fortunes.
Whatever Alonso said at halftime clearly worked.
"We want more. We want the (German) Cup, we want Europa League," the 42-year-old said over the stadium PA to thousands of Leverkusen fans after his side 43rd straight match without defeat.
The team made sure of their first trophy in 31 years with five matches left in the season.
The German equivalent of "Neverkusen" is "Vizekusen", which translates to "the champions of second place".
Leverkusen's 5-0 win over Werder Bremen at home on Sunday, including a second-half hat-trick from Florian Wirtz, sealed a first Bundesliga title in their 120-year history.
Bayer Leverkusen's record-breaking run to their first Bundesliga title was no fluke, with a 16-month plan coming to fruition.
Bayern's win means Xabi Alonso's Leverkusen, 13 points clear of the Bavarians, need to beat Werder Bremen on Sunday to lift the Bundesliga for the first time.
Xabi Alonso's Bayer Leverkusen of 2023-24 stand on the cusp of greatness, with just 11 matches theoretically between them and a record undefeated season for a top-five European league team.
With 24 wins and four draws in the league this season, Leverkusen are on the cusp of going through a Bundesliga season undefeated.
Leverkusen head into Thursday's home first leg against West Ham in the Europa League quarter-finals unbeaten in 41 matches this season, with 36 wins and five draws.
Bayer Leverkusen are just three points from a first Bundesliga title after a 1-0 win at Union Berlin on Saturday, with Bayern Munich letting a 2-0 lead slip to lose 3-2 at Heidenheim.
Bayer Leverkusen coach Xabi Alonso insisted Friday it was "still too early" to talk about the Bundesliga title despite his team being 13 points clear at the top of the table.
Bundesliga leaders Bayer Leverkusen overwhelmed second division club Fortuna Dusseldorf 4-0 on Wednesday to reach the German Cup final and stretch their unbeaten run to 40 matches across all competitions this season.
Last-gasp goals from Robert Andrich and Patrik Schick kept Bayer Leverkusen's undefeated record this season alive with a 2-1 home win over Hoffenheim on Saturday.
Saturday's "Der Klassiker" between Bayern Munich and Borussia Dortmund will unusually not be about controlling the title race or taking over the top spot in the German Bundesliga.
Bayer Leverkusen boss Xabi Alonso ended speculation of a potential move to one of his former clubs Liverpool or Bayern Munich in the close season when the Spaniard said on Friday that he was committed to staying with the Bundesliga leaders.