Pyatov mistimed his rush off the line, leaving the former Manchester City marksman to get beyond the Shakhtar keeper and calmly prod the ball into an empty net to put Roma in pole position for progress.
Mallenco twice worked for the matches of Shakhtar in the Champions League in the 2014-2015 season, "miners" in the 1/8 finals of painted draw with Bayern (0:0), and in the autumn of past year thanks to the double beat Bernard "Feyenoord" (2:1).
Cengiz Under'sgoal and a string of Alisson saves in a 2-1 away first-leg defeat had kept Roma in the tie, and Eusebio Di Francesco's men edged to victory in the return to reach the quarter-finals despite a dismal display in which Dzeko's victor was scarcely deserved.
Cengiz Under's goal in the first leg last month ultimately proved crucial for Roma, but Dzeko was the hero on the night and also proved instrumental in Shakhtar defender Ordets being shown a straight red card with 12 minutes left.
"We were patient. We knew that one goal could see us reach the quarter-finals".
"A fantastic result, a fantastic Roma: among the best eight sides in Europe", he posted.
Ukraine and, specifically, Shakhtar Donetsk said goodye to UEFA Champions League in the current season. The Bosnian took a defence-splitting pass from Kevin Strootman into his stride and beat the offside trap before he steered the ball into the far corner with the outside of his foot, past the advancing Pyatov. Then, Shakhtar's Ordets fouled on Džeko and was sent off. "We deserve to go through, to be in the quarter-finals".
"Dzeko, of course, was a key player, but apart from his goal they didn't have a chance, we had possession". - This is the first time Roma have progressed from a knockout tie in which they have lost the first leg; ending a run of five consecutive knockout tie defeats.
On Wednesday, it would be between Barcelona and Chelsea, Bayern Munich and Besiktas.
Ex-Patriots RB Dion Lewis off free agent market for Raiders
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Key drivers of high USA healthcare spending identified
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