But another error followed when former Roma defender Rudiger allowed Radja Nainggolan's cross to bounce and El Shaarawy held off Azpilicueta to prod the ball in.
Roma were the side to come back from a hefty deficit when the sides drew 3-3 at Stamford Bridge two weeks ago but Chelsea were not such willing dance partners and must now dust themselves down for a crunch clash with Manchester United this weekend. With Alisson's consistency, Roma has the best defense in Serie A with only five goals conceded in 10 matches.
The Roma striker hit an unstoppable shot with the outside of his boot, which flew past Thibaut Courtois and into the Chelsea net.
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Two members of SEAL Team 6 were flown from Mali soon after Melgar was dead and were put on administrative leave. He declined to address how Melgar died, saying NCIS does not discuss the details of ongoing investigations.
Chelsea had chances to respond before half-time.
Alvaro Morata, meanwhile, continues up front despite fielding criticism this week for his sub-par performances and comments that he was not enamoured with life in London.
This was a stunning victory for Roma, who jumped straight to the top of Group C and put themselves in the flawless position to secure qualification for the knockout stages.
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Intelligence Minister Israel Katz, a supporter of the bill, has said this would "ensure a Jewish majority in a united Jerusalem". He said it will take time to clarify the bill to the U.S. "They did not meet to discuss the annexation bill".
The centre of the pitch will be occupied by Cesc Fabregas and Tiemoue Bakayoko, with Cesar Azipilicueta and Marcos Alonso operating out wide.
Roma resumed with a determination to put the result beyond doubt, as Kolarov burst into the area to have a shot deflected behind. Diego Perotti's 63rd minute strike from outside the box sealed Chelsea's first defeat in the Champions League this season.
The experienced left-back fed Perotti, who cut inside an apologetic challenge from Pedro and arrowed a superb low drive past Courtois at his near post.
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It'll be here before the year is out, and it will be the first expansion offered as part of Destiny 2's season pass. This news came out of Paris Games Week 2017, so stay tuned for more news and announcements as the week goes on.
Central defender Kostas Manolas, who had come on as a late substitute, nearly became the next Roma name on the score sheet with a bullet header, but Courtois pulled off a spectacular reaction save to deny the Greek worldwide. Conte did not seem too pleased as his Chelsea team will now have to bounce back as soon as possible.
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