If we play like this we can play with anyone.
An incredible season had seen Barcelona go 40 matches unbeaten in La Liga and the Champions League, but Roma summoned a fightback that brought back memories of Barca against Paris Saint-Germain last season.
Roma suffocated Barcelona with high pressure, prompting the Catalan club to make a series of errant passes and turnovers.
The home fans breathed a sigh of relief four minutes later as Messi scuffed a shot straight at Alisson from six yards out after weaving his way into the area, and Roma survived another late scare when Ousmane Dembele sent an audacious shot from 40 yards out narrowly over the bar when Alisson's clearance fell into his path in stoppage time.
That came moments before Stephan El Shaarawy, another speedy and talented winger, was denied from close range.
Barcelona were struggling to get any foothold in the game and doubt quickly spiralled into fear when Roma's Daniele de Rossi clawed another goal back from the penalty spot.
The Giallorossi made them pay nearly immediately as Dzeko latched onto a glorious ball over the top from De Rossi and poked past Marc-Andre ter Stegen to open the scoring on six minutes.
"This was the best, but even better may well be yet to come".
"But of course, tonight is unforgettable", Dzeko added.
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Members of the Arizona National Guard listen to instructions on April 9, 2018, at the Papago Park Military Reservation in Phoenix. Susana Martinez told The Hill her state would help, but did not announce what date troops would be deployed.
"I'm on cloud nine", Pallotta said at the Stadio Olimpico. "Nobody believed in us".
"It was something nearly impossible", Roma midfielder Radja Nainggolan said, "but in the end it became possible".
"Imperiali!" - Imperials - said the headline in Wednesday's Gazzetta dello Sport.
Roma celebrated wildly, with their president leaping into a fountain in front of jubilant fans, as the club ended their long wait for a place in a European semi-final, but Dzeko is hoping they can go one better.
Roma capitalized on its aerial threat through Dzeko and Patrik Schick and its stifling defense forced Barcelona into a series of uncharacteristic misplaced passes.
What an wonderful night of Champions League football.
Pallotta, a Boston executive who was part of the four-man American team that purchased Roma in 2011, is also a minority owner of the Boston Celtics.
"Our results in Europe in the last two years have been very bad, we have to change things if we want to win the Champions League again".
"We can't think like we've achieved a miracle", De Rossi said. "You had the sensation that they could get the third goal at any time and in the end, they did".