Cristiano Ronaldo scored twice as Juventus thrashed Parma 4-0 to move within a point of Serie A leaders AC Milan. Ronaldo, who missed a penalty in the midweek 1-1 draw with Atalanta, made amends with his third double in four games as the Turin giants, chasing a 10th straight league title, remain unbeaten after 13 matches. "Ronaldo was quite rightly angry with himself after missing a penalty," Juve coach Andrea Pirlo said. "But fortunately he didn't have much time to stew over it and immediately got the chance to show just how much he loves to score goals." Third-placed Juve sit level on points with Inter Milan, who welcome Spezia to the San Siro on Sunday, when AC Milan also visit Sassuolo. "We're slowly getting to what we all want, not just me, but also the players," added Pirlo, whose side drew five of their first nine league games. Ronaldo started up front alongside Alvaro Morata in Parma, with Paulo Dybala not even on the bench after suffering a muscle injury. Juve made a slow start to the match, needing 42-year-old goalkeeper Gianluigi Buffon to make an excellent save to prevent Juraj Kucka giving Parma the lead. Buffon was playing against his former club, where he won the 1999 Coppa Italia and UEFA Cup titles. "Whenever I come to Parma, there's no denying it, I always have this nostalgia within me," said Buffon, who turns 43 next month. "I spent 10 unforgettable years of my life here and the people of Parma will always mean so much to me." Instead, the visitors forged ahead midway through the first half as Dejan Kulusevski side-footed home after good work from Alex Sandro. The game was all but over three minutes later, as Morata crossed for Ronaldo to power an emphatic header past home goalkeeper Luigi Sepe and into the bottom corner. The 35-year-old Ronaldo made sure of the three points shortly after the restart, collecting Aaron Ramsey's pass and drilling the ball into the net left-footed. The Portuguese star has now scored 12 Serie A goals this season - two more than AC Milan's Zlatan Ibrahimovic and Inter Milan's Romelu Lukaku - in only nine appearances. Morata got the goal his all-round display deserved in the 85th minute, nodding in his 10th of the campaign in all competitions.