Having failed to score in four consecutive games for club and country, the Real Madrid star has scored eight goals in four days. He followed up his five-goal haul at the weekend with a hat trick as Madrid beat Shakhtar Donetsk 4-0 in Group A of the Champions League on Tuesday.Angel Di Maria scored his first goal for Paris Saint-Germain in a 2-0 win against Swedish side Malmo in the group's other game.
"It was a difficult game as they have talented and dangerous players," Madrid coach Rafa Benitez said. "But we have real power up front."
Juventus, last year's runner-up to Barcelona, left it late as Alvaro Morata scored the winner in a 2-1 win away to Manchester City, which had taken the lead in their Group D match.
"I don't think we deserved to lose. We had better chances and played better than Juventus," City coach Manuel Pellegrini said. "It was not a tactical problem, Juventus just scored two beautiful goals."
Manchester United lost by the same score away to Dutch side PSV Eindhoven in Group B, and on a bad night left back Luke Shaw was carried off with a double fracture of the leg.
France striker Antoine Griezmann confirmed his blossoming reputation with both goals as Atletico Madrid won 2-0 at Turkish side Galatasary in Group C.
Here is a look at Tuesday's Champions League matches:
Group A
Cristiano Ronaldo took his Champions League tally to 80 goals — three more than Lionel Messi, who plays for Barcelona on Wednesday — with three goals in Real Madrid's 4-0 rout of 10-man Shakhtar Donetsk.
Karim Benzema put Madrid on its way with a crisp first-half finish, and the Ukrainian side's chances of a comeback were dented when defender Taras Stepanenko was sent off in the 51st minute for a lunging foul on Sergio Ramos.
It was not all good news for Madrid, which lost forward Gareth Bale in the 28th with an apparent muscle injury. He held his left calf before being attended by doctors and left the field limping. Defender Raphael Varane and center half Sergio Ramos later also had to be substituted because of injuries.
At the Parc des Princes in Paris, Ronaldo's former teammate, Angel Di Maria, took just four minutes to put PSG ahead in a 2-0 win against Swedish side Malmo.
The Argentina winger, who helped Madrid win its 10th European Cup in 2014, curled the ball majestically into the top left corner after cutting in from the right for his first PSG goal since joining from Manchester United.
Group B
Manchester United squandered a lead to lose 2-1 at PSV Eindhoven and had left back Luke Shaw carried off with a double break of his right leg on an unhappy return to the Champions League.
Shaw required oxygen as he was being taken off on a stretcher after being hurt by a tackle in PSV's area from Hector Moreno in the 15th minute. Images showed Shaw's right foot was bent at a 45-degree angle.
Memphis Depay, signed from PSV this summer, gave United the lead in the 41st minute match by dribbling between two defenders and shooting through the goalkeeper's legs.
Most players choose not to celebrate goals against their former clubs but Depay said he would, and kept his word as he raised both arms in the air.
There was little to celebrate after that, though.
Moreno equalized in first half stoppage time with a header that deflected in off United defender Daley Blind. Luciano Narsingh's 57th-minute goal secured victory.
The Dutch champions top the group ahead of German side Wolfsburg, which beat CSKA Moscow 1-0 thanks to Germany midfielder Julian Draxler's first goal for the club.
Draxler, brought in from league rival Schalke to replace Kevin de Bruyne after he left to join Manchester City, struck five minutes before the break.
Group C
Iberian clubs seized the advantage, with Atletico Madrid winning 2-0 at Galatasaray and Benfica defeating tournament debutant Astana by the same margin.
Antoine Griezmann got both Atletico's goals in the space of seven minutes in the first half as the group favorite exposed the Turkish team's defensive shortcomings.
The France forward's first was fine low shot into the bottom corner from just outside the penalty area and the second, far easier, was scored from close range.
Turkish side Galatasaray is winless in its last nine European games.
Astana, the first team from Kazakhstan to reach the group phase, was no pushover at the Stadium of Light in Lisbon where storied Benfica had to wait until the second half for a breakthrough.
The Portuguese club's opening goal came in the 51st from Nicolas Gaitan, followed 11 minutes later by Greece striker Kostas Mitroglou.
Astana briefly worried the home crowd after the interval when substitute Aleksei Schetkin hit the post.
Group D
Juventus cast aside its domestic woes by coming from behind to beat Manchester City 2-1, with Alvaro Morata scoring an 81st-minute winner for last season's runner-up.
Winless in the opening three matches of its title defense in Italy, Juve went behind in its European debut when defender Giorgio Chiellini — under pressure from Vincent Kompany at a corner — headed into his own net in the 57th minute.
Mario Mandzukic glanced home a whipped cross from Paul Pogba for 1-1, before Morata curled in the winner from outside the penalty area after a long ball forward was deflected into his path.
It's a great start by Juventus to what many regard as the toughest group of them all, although Sevilla also began well with a 3-0 win over Borussia Moenchengladbach.
Sevilla was awarded three penalties, and converted two of them through striker Kevin Gameiro and midfielder Ever Banega.
Gameiro had a particularly eventful night. He also missed a second spot kick. He was then fouled for the third penalty, but Banega took it instead and scored.
Yevhen Konoplyanka scored a late third for the Europa League champions.
Related story
Ronaldo penalty sends Real through after thrilling Juve fightba...
