The former AC Milan wonderkid needed just 34 seconds to open the scoring at Stadio Olimpico, leaving the Blues shellshocked in the Eternal City.
The goal was also the quickest Roma have ever scored in the competition.
What A Strike!— BT Sport Football (@btsportfootball) 31 de octubre de 2017
Stephan El Shaarawy with the fastest goal in the Champions League this season!
Unreal connection after 39 seconds pic.twitter.com/VNKXgo3ZNa
Thibaut Courtois had no answer to a perfectly timed volley after the Chelsea defence had left El Shaarawy all alone at the far post
Can Antonio Conte's men fight back after such a disastrous start?