Xabi Alonso's side celebrated winning their first-ever Bundesliga title last weekend after cruising to a 5-0 home victory over Werder Bremen – their 25th victory in their 29th league game of the campaign.
Leverkusen were then tasked with preserving their 2-0 first-leg lead in the quarter-finals of the Europa League against West Ham, but they were surprisingly outclassed by the Hammers in the first half at the London Stadium and fell behind in the 13th minute.
Michail Antonio met a dangerous delivery from Jarrod Bowen to head home from close range, and Leverkusen initially struggled to cope with West Ham's high press and threat from crosses.
However, a tiring West Ham outfit eventually ran out of ideas after the break, and Leverkusen showed a great level of maturity to gradually grow back into the contest and net an 89th-minute equaliser through Jeremie Frimpong.
Leverkusen surpass Juventus to break European recordLeverkusen's hopes of going through the entire 2023-24 campaign without defeat remain alive as they have now extended their remarkable unbeaten run to 44 games across all competitions.
Thirty-eight victories and six draws have been posted during this run and their latest draw with West Ham has seen Alonso's side set a new record.
Indeed, Leverkusen 44-game undefeated streak is the longest for any team in Europe's top-five league, surpassing the previous record holder Juventus, who enjoyed a 43-match unbeaten run between May 2011 and May 2012.
Leverkusen last tasted defeat 328 days ago in May last year when they were beaten 3-0 by VfL
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