Daniele De Rossi felt Roma had a "blackout" against Liverpool at Anfield and were punished by their opponents' persistent long balls forward.
Eusebio Di Francesco's side lost 5-2 in the first leg of their semi-final tie, meaning they must replicate their 3-0 win over Barcelona in the quarter-final second leg if they are to progress to the final.
Liverpool were 5-0 up with 68 minutes played, with Mohamed Salah and Roberto Firmino scoring twice and Sadio Mane also on the scoresheet, as the visitors failed to deal with the Reds' quick-fire passes to the front three.
However, late goals from Edin Dzeko and Diego Perotti gave the visitors some hope ahead of the return fixture in the Italian capital, and De Rossi is refusing to give up.
"We have to hold on to what we did in the quarter-finals," he told Mediaset Premium. "That tells us it's not impossible and that we have a duty to try, for ourselves and, above all, the people who love Roma.
"The only difference is that, against Barcelona, I felt it was an unlucky game, with dubious incidents. We had a good first 20-25 minutes here, then we were less good at covering the space, but it's difficult to do that when they're much faster than you.
"It's not right to put conceding so many goals on the defence. We all played very aggressively, even though we had the feeling of being able to affect little in midfield because they often bypassed it. They constantly went for the long ball, from any area of the pitch.
"Today was a case of our blackout and their great quality. It won't be easy, but we have to start from here. It's not impossible and we know that."
De Rossi also praised the performance of Salah, his former team-mate having produced arguably his best performance of a spectacular season, with two goals and two assists.
"We know Salah well, we know he is a great player as well as a great person," he said. "He's improved his quality in the final third and he's becoming decisive, as we thought he would."
23 de mayo 2018
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|Mets sign Bautista, start him same day|
|Warriors´ Iguodala ruled out for game four|
|Guzman called up as Romero replacement for Argentina|
|Gaya signs new five-year Valencia contract|
|Celta appoint Antonio Mohamed as new coach|
|Klopp: Real Madrid have no weaknesses|
|Strauss ´stepping away´ from England role to support wife|
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22 de mayo 2018
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|Two trophies in a week! Torres leaves Atletico Madrid in style|
|I died a thousand deaths - Yates set for Giro defensive after time trial|
|Hamsik hints at Napoli exit amid China rumours|
|Rowett swaps Derby for Stoke|
|Thiem comfortable in victory as rain delays Wawrinka|
|Schmelzer gives up Borussia Dortmund captaincy|
|Top seed Stephens struggling at Nuremberg Cup|
|This is the wrong information - Vieira rejects Nice speculation|
|France rest Guirado, recall Thomas for New Zealand tour|
|Warriors´ Iguodala upgraded to questionable for game four|
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|AC Milan referred over alleged FFP breaches|
|F1 Raceweek: Ferrari and Red Bull target Monaco upturn|
|Horoya 2 Mamelodi Sundowns 2: Camara header denies visitors´ comeback|
|Du Plessis rescue mission takes Super Kings to IPL final|
|Seedorf to leave relegated Deportivo|
|Wenger turned down Real Madrid ´two or three times´|
|Kane dreams of lifting World Cup trophy as England captain|
|UEFA opens disciplinary proceedings against Liverpool & Roma|
|Yates stays on course for Giro title, Dennis wins time trial|
|Brighton sign Nigeria international Balogun|
|Ronaldo again pips LeBron and Messi as sport´s most famous star|
|Marcelo fears backlash if Madrid lose Champions League final|
|Messi joins Argentina´s World Cup training camp|
|FIFA finds no doping cases in Russia´s World Cup squad|
|Liverpool´s strikeforce reminds Ronaldo of Real Madrid|
|Hysaj staying at Napoli ´regardless of Sarri´s future´|
|Amir fully fit for Lord´s Test|
|A fast start to life - The Golden Knights and the expansion teams who excelled early|
|Molina gets two-year anti-doping ban for positive test after Joshua bout|
|Ramos: We´re a vintage Real Madrid team|
|Klopp key to controlling Liverpool emotions, says Alonso|
|Bjorn names Westwood, Harrington, Donald and McDowell as Europe vice-captains|
|Scarlets players left wounded by ´shocking´ Scotstoun pitch|
|Arsenal fined £20,000 for Leicester penalty protest|
|Storm offer Bellamy ´significant´ deal amid reported Broncos interest|
|Rashford writes moving tribute on anniversary of Manchester Arena attack|
|Heaton backs Kane´s captaincy credentials|
|Salah deserves Ballon d´Or if Liverpool win Champions League – Owen|
|Wasps flanker Willis out for up to a year|
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|Pellegrini targets Europe with West Ham|
|Lopetegui extends Spain contract|
|Edinburgh-bound Barclay´s Scarlets career over following Achilles surgery|