The 37-year-old Ronaldo will hope to help Portugal escape Group H, where they face Ghana next Thursday before clashes against Uruguay and South Korea.
Messi, 35, heads to Qatar with one of the pre-tournament favourites, Argentina, who start Group C against Saudi Arabia on Tuesday, with meetings against Mexico and Poland to follow.
Having battled for centre stage against former Barcelona star Messi for numerous years, ex-Real Madrid forward Ronaldo admitted he would love to face his old foe in the World Cup showpiece on December 18.
“It’s too good, too good of a dream,” Ronaldo told Piers Morgan on TalkTV in his wide-ranging interview, in which he criticised Manchester United, senior figures at Old Trafford, Erik ten Hag and Ralf Rangnick.
The pair share 12 Ballon d’Or titles between them, with Messi’s record-breaking seven two more than Ronaldo’s haul, surmising a dominant period in elite football between the evergreen duo.
Messi now plays his club football with Paris Saint-Germain, while Ronaldo’s time at United appears to be heading to an abrupt end amid the furore of his scathing interview on his current employers.
The Portugal international, despite the revered battles between the pair throughout their respective careers, assured he has a “great relationship” with Messi, who he would like to sit down for a meal with.
“He is an amazing player, he is magic. As a person, he is top. We shared the stage for 16 years, imagine,” he added.
“I have a great relationship with him. I’m not a friend of him in terms of the guy who is at your house, speaking on the phone, no, but he is like a team-mate.”