Sérgio Oliveira marked his debut by winning and converting a penalty to help new side Roma to a 1-0 victory over relegation-threatened Cagliari in Serie A on Sunday.

Oliveira, who joined on loan from Porto on Wednesday, netted in the 34th minute to help Roma end a winless streak of three matches and move into sixth spot in Serie A. Cagliari was two points from safety.

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Roma's Sergio Oliveira, center, is cheered by teammates after scoring during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Sérgio Oliveira marked his debut by winning and converting a penalty to help new side Roma to a 1-0 victory over relegation-threatened Cagliari in Serie A on Sunday.
Roma's head coach Jose Mourinho, center, gives directions to his players during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

José Mourinho’s Roma came into the match on the back of two straight losses but thought it had got off to the perfect start when the referee, Lorenzo Maggioni, awarded a penalty in the fourth minute.
Cagliari's Dalbert, right, controls the ball with his arm during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Oliveira struck the resulting penalty into the bottom right corner.
Cagliari's Joao Pedro lies on the pitch during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Nani had an immediate impact as he provided an assist moments after coming on to help Venezia rescue a 1-1 draw against Empoli.
Roma's Tammy Abraham, left, and Cagliari's Edoardo Goldaniga vie for the ball during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

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Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)

Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)
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Roma's Sergio Oliveira, center, is cheered by teammates after scoring during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Sérgio Oliveira marked his debut by winning and converting a penalty to help new side Roma to a 1-0 victory over relegation-threatened Cagliari in Serie A on Sunday.

Roma's head coach Jose Mourinho, center, gives directions to his players during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

José Mourinho’s Roma came into the match on the back of two straight losses but thought it had got off to the perfect start when the referee, Lorenzo Maggioni, awarded a penalty in the fourth minute.

Cagliari's Dalbert, right, controls the ball with his arm during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Oliveira struck the resulting penalty into the bottom right corner.

Cagliari's Joao Pedro lies on the pitch during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Nani had an immediate impact as he provided an assist moments after coming on to help Venezia rescue a 1-1 draw against Empoli.

Roma's Tammy Abraham, left, and Cagliari's Edoardo Goldaniga vie for the ball during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

More AP soccer: https://apnews.com/hub/soccer and https://twitter.com/AP_Sports

Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)

Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)

League leader Inter Milan visited fourth-place Atalanta later Sunday and can move four points clear with a win.

Roma's Sergio Oliveira, center, is cheered by teammates after scoring during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Roma's Sergio Oliveira, center, is cheered by teammates after scoring during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

José Mourinho’s Roma came into the match on the back of two straight losses but thought it had got off to the perfect start when the referee, Lorenzo Maggioni, awarded a penalty in the fourth minute.

However, after reviewing the incident on the pitchside monitor, the referee realized that Cagliari defender Andrea Carboni had got the ball with a great tackle on Nicolò Zaniolo and he rescinded the penalty.

VAR was in Roma’s favor later in the half, however, as the referee again went to the monitor and saw that a shot from Oliveira had been blocked by Cagliari defender Dalbert with his arm.

Roma's head coach Jose Mourinho, center, gives directions to his players during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Roma's head coach Jose Mourinho, center, gives directions to his players during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Oliveira struck the resulting penalty into the bottom right corner.

Roma should have doubled its lead and was almost made to pay for its profligacy six minutes from time but goalkeeper Rui Patrício pulled off a sensational save to push a close-range shot from João Pedro onto the crossbar.

IMMEDIATE IMPACT

Cagliari's Dalbert, right, controls the ball with his arm during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Cagliari's Dalbert, right, controls the ball with his arm during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Nani had an immediate impact as he provided an assist moments after coming on to help Venezia rescue a 1-1 draw against Empoli.

Nani came on for his debut 18 minutes from time and the former Manchester United player set up David Okereke moments later. Szymon Żurkowski had scored the opener for Empoli in the 26th minute.

Also, Antonín Barák bagged a hat trick as Hellas Verona won 4-2 at Sassuolo.

Cagliari's Joao Pedro lies on the pitch during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Cagliari's Joao Pedro lies on the pitch during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

More AP soccer: https://apnews.com/hub/soccer and https://twitter.com/AP_Sports

Roma's Tammy Abraham, left, and Cagliari's Edoardo Goldaniga vie for the ball during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)

Roma's Tammy Abraham, left, and Cagliari's Edoardo Goldaniga vie for the ball during the Serie A soccer match between Roma and Cagliari at Rome's Olympic stadium, Sunday, Jan. 16, 2022. (AP PhotoAndrew Medichini)
Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)

Verona's Antonin Barak celebrates scoring during the Serie A soccer match between Sassuolo and Verona at Mapei stadium, Reggio Emilia, Italy, Sunday Jan. 16, 2022. (Massimo PaoloneLaPresse via AP)