It would be the first time Pepe and Ronaldo will be playing each other in their career, as both represented the same country and have been in the same club close to a decade.
The centre back played for Porto while the Ronaldo plys his trade with Sporting Lisbon before making their way out of Portugal.
Pepe joined Real Madrid while Ronaldo joined Manchester United and in 2009 he moved to the Spanish capital to reunite with Pepe, where they both won the La Liga and the Champions League before the veteran defender left for Besiktas and later Ronaldo left for Juventus.
The ex-Real Madrid defender has issued a warning to the free-scoring attacker to wary of the threat Porto pose.
“It will be a special game against Cristiano, I have never played against him. He is a great friend of mine, but of course, we want to beat him and Juventus.”
Ronaldo is set to take Juventus to the Champions League final having been knocked out by Ajax and Lyon in the last two seasons.