Pepe, whose team face Morocco Wednesday, said it was an honour to play alongside Ronaldo.
There is history between these teams, as well as Ronaldo and Morocco centre back Mehdi Benatia.
Ronaldo rescued Portugal with a hat-trick in a thrilling 3-3 draw with title contenders Spain, while Messi missed a penalty as Argentina were held 1-1 by tournament newcomers Iceland. He is Portugal and Real Madrid's record goalscorer.
His record in the Champions League - a tournament he has won five times - is even more impressive, with 48 goals in 44 appearances since turning 30.
By the end of Wednesday's three matches, we'll be nearly a third of the way through this World Cup. It did not have a single shot on target in the opener against Russian Federation. I can say that makes things easier.
While his one-man show on the field kept the world glued to the tv sets for a whole 90 mins, his heartwarming act of the field is making news right now. He was sent off for a handball against Ghana in the quarterfinals of the 2010 tournament, earning a suspension that had him on the sidelines in a loss to the Netherlands that prevented Uruguay from advancing to the final.
Mohamed Salah's fitness not solely at fault for Egypt's woes - Hector Cuper
Hosts Russia got their 2018 World Cup campaign off to the flawless start, annihilating Saudi Arabia in their opening game. And the Egypt global had to watch on as Uruguay claimed a 1-0 win over his side in their group stage opener.
Kick off from Rostov-on-Don is 11pm and the game is live and exclusive on the Now TV World Cup channels.
Spain, meanwhile, should be able to build on some positive moments from their match against Portugal when they finish the day's action against Iran.
Smarting after a last-gasp defeat to Iran, Morocco will have to deal with the peerless might of Portugal, spearheaded by Cristiano Ronaldo, who will attempt to follow up his World Cup opening game heroics when the two sides meet for a Group B clash here on Wednesday.
Several of Ramos' Spain teammates, including Cesar Azpilicueta and David De Gea, saw the incident and laughed.
Who else but Cristiano Ronaldo? "Obviously he knows he made a mistake", Spain defender Nacho Fernandez said.
"More important than his physical form is his mental form", said Santos. Sandwiched between those two matches, the fourth Group A match of the competition will see Uruguay go up against Saudi Arabia. "They have always played to the best of their abilities with full intensity".