The Blues booked their place in the semi-finals with a 4-3 victory at Stamford Bridge on Thursday night, giving them a seemingly comfortable 5-3 win on aggregate – although it was anything but.
Maurizio Sarri’s men, who took a one-goal advantage into the second leg, cruised to a 4-1 lead at half-time before they were stunned and made to work for the victory when Petr Sevcik struck twice.
Suddenly, anxiety spread throughout Stamford Bridge as the Blues defence continued to shake, with Slavia just two goals away from dumping Chelsea out.