They are the two best footballers in the world – both fiercely loyal to their clubs.
But what would happen if Cristiano Ronaldo and Lionel Messi swapped teams?
Would Barcelona become even better? Would Real struggle? How well would the players age?
YouTuber Rich Leigh decided to find out using FIFA 17’s Career Mode.
To get the pair to swap clubs, Rich took control of Real Madrid and made a bid for Messi – offering 15,000,000 plus Ronaldo.
Unsurprisingly, this was accepted pretty sharpish.
Now for the tricky part – getting the Argentine to agree a contract.
After loads of offers, Messi finally agreed to join for a ridiculous £1,100,000 a week.
So, how did the pair do?
After the end of the season, the 29-year-old scored a total of 18 goals in 45 appearances – bagging 10 assists and average rating of 7.30.
Ronaldo, meanwhile, scored 11 goals in 35 league games, two goals in seven in the Copa Del Rey and four in 12 in the Champions League.
This puts him just one off the Argentine’s total tally for the season.
It’s more good news for Messi as Los Blancos topped the league table with 88 points.
Barcelona were some way behind them with 79, while Villarreal came third with 74.
In the Copa del Rey, Messi led his team to a 5-1 victory over Ronaldo’s Barcelona.
Sadly they then messed up in the final against Real Sociedad.
Ronaldo’s Barcelona did fare better than Real in the Champions League – reaching the semi final while Real couldn’t make it through the last 16.
Rich then looked at the second season – with both players taking a hit on their overall ratings.
Still, Messi managed to score 38 goals in 58 appearances, while Ronaldo netted 23.
Unsurprisingly, Real Madrid ended up topping the league with Ronaldo’s Barca coming third.
Fast forward a few seasons and both players are nearing retirement age.
But who has the edge – a 37-year-old Ronaldo or a 35-year-old Messi?
Time hasn’t been kind to Ronaldo with his once famed sprint speed now a shocking 41.
Unsurprisingly, he chooses to retire – but still did well in his final season.
The now 74-rated star scored four goals in five league appearances and four goals in three games in the Copa del Rey.
Messi, meanwhile, saw his stats take a pounding – with agility now rated at 35 and sprint speed 41.
The 35-year-old had a quiet season, with just nine goals in 30 appearances and an average match rating of 7.10.
Still, Real Madrid ended up winning the league, with Barcelona missing out on the top spot by just one point.
In fact, even with an ageing 81-rated Messi – Los Blancos went on to win the Champions League – knocking out Barca in the semis.
So, there you have it.
Even in their later years, Ronaldo and Messi will remain forces in world football for years to come.