LONDON, ENGLAND - MAY 09: Maurizio Sarri, Manager of Chelsea reacts alongside Adi Huetter, Manager of Eintracht Frankfurt during the UEFA Europa League Semi Final Second Leg match between Chelsea and Eintracht Frankfurt at Stamford Bridge on May 09, 2019 in London, England. (Photo by Catherine Ivill/Getty Images)

Hütter led Frankfurt into the 2018/19 Europa League semi-finals, where they were beaten on penalties by Maurizio Sarri's Chelsea.