The argument between Edinson Cavani and Neymar over who should have taken the penalty against Lyon last week has been one of the most intriguing stories of the season so far.
Recent world record recent arrival Neymar was eager to assert his seniority on the rest of his Paris Saint-Germain teammates by assuming penalty kick duties. Cavani, however, wasn't having any of it.
As we all now know, the Uruguayan stepped up only to see his effort saved by Anthony Lopes - an outcome which has intensified the rumours of a rift between two of Unai Emery's star men.
But of course, it isn't the first time two teammates haven't seen eye-to-eye over a set-piece and it won't be the last.
And just to prove it can happen at any club in the world, we've stumbled across a video from a few years ago which appears to show Cristiano Ronaldo and Sergio Ramos disagreeing.
The clip, uploaded to YouTube by Football HD TV, is taken from a match against Sevilla in 2013.
As the video shows, with Los Blancos already 7-3 up in the 93rd minute, Ronaldo wanted to score his fourth goal of the game from a free-kick.
Ramos is lurking just behind him and is clearly trying to get in on the action.
Alvaro Arbeloa then urges the Portuguese star to let Ramos take it but Madrid's No.7 is unperturbed and continues his trademark setup.
Ramos reportedly said: "If I shoot, it's a goal!" - still nothing from Ronaldo.
In the end, it requires a second intervention from Arbeloa to convince Ronaldo that Ramos should take it - at which point the latter is seen with a beaming smile on his face.
Like Cavani, Ramos was unable to score and the game finished 7-3.
Despite their success at the Bernabeu, it would appear Ramos and Ronaldo have enjoyed a fractious relationship over the last few years.
The Spaniard was forced to deny he had made claims suggesting Ronaldo was given special treatment by Zinedine Zidane earlier this year.
It was reported Ramos had told reporters: "The only one who does not have to run (track back) is Cristiano because he gets 60 goals."
At least the amount of subsequent success the Madrid pair duo have enjoyed will encourage PSG supporters that Neymar and Cavani can work through their differences too.
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