Cristiano Ronaldo converted a first-half penalty as leader Juventus resumed its Serie A campaign with a 2-0 win at Bologna on Monday, lifting some of the pressure off coach Maurizio Sarri.

After missing a spot kick in a Coppa Italia match against AC Milan 10 days ago, Ronaldo made no mistake in the 23rd minute and Paulo Dybala curled in a brilliant second before halftime to give the Turin side a comfortable win.

Juventus, with 66 points from 27 games and chasing a ninth successive title, extended its lead to four points over Lazio, which visits Atalanta on Wednesday. Bologna is 10th.

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Juve's failure to score in two Coppa Italia games following the end of the new coronavirus stoppage, coupled with its defeat on penalties to Napoli in Wednesday's final, raised questions over Sarri, who has struggled to impose his style of play in his first season at the club.

There were no questions about the Juventus defence, however, which kept a fourth straight clean sheet in all competitions.

“I think there's been too much talk, we have to square up and respond with facts like tonight,” said defender Leonardo Bonucci.

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“It's normal to talk about what happened after defeat, especially in a final. We had a discussion and traced a plan, which has been seen today.”

After fielding Ronaldo in an unfamiliar centre-forward role against Napoli, Sarri returned the Portuguese to his more comfortable position wide of the centre.

Juve got the breakthrough when Stefano Denswil grabbed Matthijs de Ligt's shirt at a corner and Ronaldo drilled home his 22nd league goal of the season from the spot.

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A clever backheel by Federico Bernardeschi set up the second for Dybala who curled an unstoppable shot beyond goalkeeper Lukasz Skorupski.

Bernardeschi crashed a shot against the crossbar and Ronaldo had another goal disallowed for offside in the second half.

The only disappointment for Juve was an injury to defender Mattia De Sciglio and a red card for his replacement Danilo after he was booked twice in quick succession near the end.

“We knew Juve would be angry,” said Bologna coach Sinisa Mihajlovic. “It's almost impossible for them to slip up three games in a row.”

-Coronavirus threat continues to loom over Dybala-

Paulo Dybala remains as dangerous as ever despite nearly 50 days with the coronavirus.

Dybala was isolated for 46 days starting in March when he continued to test positive for the virus week after week, even though he was reportedly without symptoms. Dybala's girlfriend also tested positive.

"To tell you the truth, I didn't really feel that great today," Dybala said. "But I'm happy that I played a great match. During the time when I was idle I tried to stay in form by eating nutritiously."