Spanish radio has revealed the Portuguese star went head-to-head verbally with Atletico midfielder Koke in what was a fiery Madrid derby
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The two sides met in what was the final La Liga match to ever be played between the rivals at Atleti's Vicente Calderon, with Ronaldo's hat-trick handing Real a 3-0 win to keep them top of the table.
But, while Ronaldo stole the headlines because of his goals, attention was also on the Portuguese following an altercation with Atletico midfielder Koke, who is alleged to have questioned his opponent's sexuality.
When questioned by journalists after the game, Koke refused to comment, but Cope Radio later revealed the string of events explained by an unknown team-mate of Ronaldo.
The radio station explained that, when Koke and Ronaldo went head to head, the Atletico man labelled Ronaldo a "f****t" before the Real star hit back with "A f****t with a lot of money, s***head".
Ronaldo had not received a yellow card in his previous 12 meetings with Diego Simeone's men but was booked for his part in the incident.
The victory kept Zinedine Zidane's men top of the Spanish topflight having won nine and drawn three of their 12 fixtures, with a goal difference of +24.
Ronaldo leads his team-mates in terms of goals, with eight, and the forward believes that his form over the past year, for club and country, is enough for him to be awarded with the Ballon d'Or.
The 31-year-old hit 51 goals in 48 matches in all competitions for Real Madrid last season, including 16 in 12 Champions League appearances as Zinedine Zidane's side won the trophy for the second time in three years.
The forward also captained Portugal to their first major title at Euro 2016, scoring three times to help them reach the final, where a solitary strike from Eder secured a 1-0 win over France.
The winner will be announced on December 13.