Eintracht Frankfurt manager Adi Hutter has warned of the threat posed by Chelsea's Eden Hazard in the UEFA Europa League semi-finals and said his side will need to "double up" on the Belgian to nullify him.
The German team host Chelsea in the first leg of their last-four clash on Thursday, and Eintracht will likely need to take a lead into the second leg at Stamford Bridge if they are to make it to the final.
Not conceding an away goal could also be crucial, and Hazard will be Chelsea's biggest threat in that respect.