Xabi Alonso suffered his first Bundesliga defeat as Bayer Leverkusen coach on Saturday as his side slumped to a 5-1 loss at Eintracht Frankfurt after a dramatic second-half collapse.The Spanish coach was left scratching his head as his side gave away two penalties, conceded five goals and had a player sent off against a clinical Frankfurt side.Randal Kolo Muani endured a miserable first half for Frankfurt, missing several chances from open play before seeing his penalty saved by Lukas Hradecky on the stroke of half time.Hradecky was judged to have left his line too quickly, however, and Daichi Kamada smashed in the retake to put the home side in front.Piero Hincapie levelled the scores with a diving header in the second half, but Leverkusen's joy was short-lived as they immediately went to sleep at the back.Having lost the ball deep in their own half, the visitors then allowed Kolo Muani to ghost through the box and head in a Christopher Lenz cross.Jesper Lindstrom doubled the lead with a scintillating chip over Hradecky's head a few minutes later, before Leverkusen completely imploded.Hincapie was sent off for a challenge on Kolo Muani, allowing Kamada to score his second penalty of the day, and former Leverkusen striker Lucas Alario rubbed salt in the wound with Frankfurt's fifth a few minutes from time.Leverkusen are now third from bottom in the relegation play-off place.They have slipped behind fellow strugglers Stuttgart, who stormed to a 4-1 win over bottom side Bochum in their first game since the sacking of US coach Pellegrino Matarazzo.Stuttgart got off to a dream start under interim boss Michael Wimmer, as Silas Katompa Mvumba put them ahead from the penalty spot after just three minutes.The Democratic Republic