Cristiano Ronaldo has scored 12 goals in his first two appearances for Al Ahli, the Saudi Arabian club he joined on loan from Manchester United last week.
The Portugal forward made his debut in Tuesday's 3-1 win over Al Nassr and then netted twice in Wednesday's 4-1 victory against Al Ittihad. He also had a goal disallowed after a VAR review.
Ronaldo's first goal came in the 77th minute as he finished off a slick move involving Edinson Cavani and Bruno Fernandes before adding another late on to make it 3-0.
It was Ronaldo's 66th career hat-trick - only one bettered by Lionel Messi (69) - and he now has 155 international goals, overtaking Diego Maradona as the all-time leading scorer for his country.
"I'm very happy with my performance today," said Ronaldo, who is expected to play more regularly at Al Ahli following the injury to Argentina star Lautaro Martinez.
"It was a difficult game but I managed to score three goals. The fans were amazing and I hope they keep supporting me."
Al Ahli coach Adel Abdesseleme added: "He is a player with a great personality and we're looking forward to working with him."