Bayer Leverkusen won the first Bundesliga title in their history with a 5-0 win over Werder Bremen on Sunday, securing the championship with five games to play.
Alonso's team remain unbeaten in all competitions this season having broken Bayern Munich's German record of 32 games without a defeat in all competitions in February. The run now stands at 43 in all competitions.
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Leverkusen took the lead in the 25th minute through Victor Boniface's penalty, and a long-range strike from Granit Xhaka in the second half added comfort to the score in front a rapturous BayArena crowd.