Roma struggled in the first half and spread in the second against HJK Helsinki for the first three points of their Europa League.
Mourinho solves it by inserting Dybala in the second half in a game played for 80 minutes in numerical superiority.
In goal also Belotti and Pellegrini, awarded at the Olimpico as the best player of the last Conference.
The Finns approach the game with a good personality, immediately going close to scoring at minute 6 with a high shot by Hostikka from a greedy position.
But the guest hopes are reduced to a flicker already at 14 'when Belotti flies towards the area and is spread by Tenho: the referee Petrescu goes to review the episode at the Var and draws the red to the Helsinki captain.
Roma creates, but when it is necessary to conclude it is often imprecise.
At 26 'instead, Rui Patricio's post trembles, saved only by the wood on his left, on a Hoskonen gored.
At 33 'Hazard blocks Belotti's sudden conclusion in two halves, while shortly after Zaniolo fails one of the many opportunities available to him, kicking on the goalkeeper's body.
The first fraction ends with another chance on Belotti's head, in the archive on the side.
It is the changes that unlock the race, or rather Paulo Dybala.
The Argentine takes just over a minute from his entry into the field to score: usually left-handed to cross from the edge and 1-0 in the 47th minute.
120 seconds pass and Roma doubles: Zaniolo's personal action, ball in the middle and Pellegrini's chest tap-in.
The Capitoline are rampant throughout the fraction going close to the big target with each piece of their attack.
At 68 'Belotti's first Giallorossi center takes shape, 137 days after the last goal with Toro: it is a photocopy of the 2-0 goal, with the former grenade in place of the number 7. In the final there is space - but not as much glory - for Abraham.
Conference League, Basaksehir-Fiorentina 3-0
Fiorentina's progress in the Europa Conference League becomes more complicated.
Basaksehir defeated the Viola 3-0 in a Group A match played at the Fatih Terim stadium in Istanbul.
Gurler's brace in the 57th and 71st minutes and Traoré's goal in the 90th minute decided the match.
The Viola closed the match with ten men due to the expulsion of Ikoné in the 76th minute for a double yellow card.
In the other match of the group, the Scottish Hearts 2-0 away victory over the Latvians of Rfs Riga. Basaksehir leads in the standings with 6 points, Hearts and 3, Fiorentina and Rfs Riga close at 1.