Cristiano Ronaldo is a footballer who is synonymous with the UEFA Champions League.Throughout the course of his incredible professional career, the 37-year-old superstar has made club football's biggest competition his own personal playground.Ronaldo has won the Champions League fives times and that doesn't even tell half the story of his magnificence on the European stage.No player has scored more goals (141) or contributed more assists (42) in the competition's rich history.Ronaldo just loves the Champions League and the fact he was unable to lift ol' Big Ears in a Juventus shirt will still hurt him to this very day.He joined the Italian outfit from Real Madrid in the summer of 2018 for a €100 million fee and his main goal was to finally bring the trophy to Turin after so many near misses previously.But Champions League glory never came during Ronaldo's spell at Juventus and they actually failed to even make it to the semi-final stage in his three seasons wearing black and white.TURIN, ITALY - MARCH 09: Cristiano Ronaldo of Juventus interacts with Wojciech Szczesny of Juventus during the UEFA Champions League Round of 16 match between Juventus and FC Porto at Juventus Arena on March 09, 2021 in Turin, Italy. Sporting stadiums around Italy remain under strict restrictions due to the Coronavirus Pandemic as Government social distancing laws prohibit fans inside venues resulting in games being played behind closed doors. (Photo by Valerio Pennicino/Getty Images)In the 2020/21 campaign, the Bianconeri were eliminated at the Round of 16 by FC Porto in what was an epic two-legged tie.Porto won the first leg 2-1 on home soil and then progressed to the quarter-finals on away goals after losing 3-2 in Turin.And at half-time in the second leg - when Juventus were 1-0 behind and 3-1 down on aggregate - Ronaldo made his frustration with the performance clear for all his teammates to see.The five-time Ballon d'Or winner had a dressing room altercation with Juan Cuadrado, which was shown on the team's All or Nothing documentary on Amazon Prime.

Video: Ronaldo and Cuadrado's clash at HT of Juventus 3-2 Porto

Here's the transcript...

Ronaldo: “We have to work harder. What the f***! We didn’t play at all! Nothing!”

Cuadrado: “Don’t worry”

Ronaldo: “We played s***, always!”

Cuadrado: “You must be an example for everyone”

Ronaldo: “I’m included too. We have to tell each other the truth, we played s***. This is a Champions League match, we need to have personality.”

Andrea Pirlo, who was manager at the time, then walked into the room and put an end to the war of words between Ronaldo and Cuadrado.

Pirlo: “That’s enough, let’s go. That’s enough, Cri. That’s enough, Juan.

“We have to be calm and patient. We will continue in this spirit, but without arguing, with the posture of someone who wants to win.”

TURIN, ITALY - MARCH 09: Cristiano Ronaldo of Juventus interacts with Adrien Rabiot of Juventus prior to the UEFA Champions League Round of 16 match between Juventus and FC Porto at Juventus Arena on March 09, 2021 in Turin, Italy. Sporting stadiums around Italy remain under strict restrictions due to the Coronavirus Pandemic as Government social distancing laws prohibit fans inside venues resulting in games being played behind closed doors. (Photo by Valerio Pennicino/Getty Images)

Things got a little bit tasty.

Juventus did actually improve quite a bit in the second half, with two goals from Federico Chiesa either side of a red card for Mehdi Taremi taking the tie to extra-time.

But a shock goal from Sergio Oliveira in the 115th-minute left Pirlo's side needing two of their own to qualify and they could only muster the one through Adrien Rabiot.