Two of Europe's finest defensive sides will square off tonight but two superstar Portuguese attackers at opposite stages of their careers will be hoping to steal all of the headlines.
Atlético Madrid vs Juventus is always a heavyweight clash in any Champions League season and it should prove so again tonight.
João Félix has started well at Atlético Madrid and is off the mark for the club after his goal against Eibar in their last home clash in LaLiga. Tonight, he will make his Champions League debut for Rojiblancos and he'll have to do so against his international captain. The €126m outlay for the 19-year-old ex-Benfica attacker is a considerable sum, and big performances on the grandest stages in Europe will start to repay that fee.
Juventus talisman Cristiano Ronaldo is a bona fide legend of the game. At 34, he doesn't show any signs of slowing down and recently notched his 93rd international strike for Portugal after a four-goal haul against Lithuania. He's won the Champions League title five times as a player and seems desperate to elevate that number to six and become only the second-ever player to win the title with three different clubs.
There was a fascinating contrast between last season's two meetings between these teams at the group stages. Atlético's typical defensive approach earned them a hard-fought 2-0 win in Madrid, only for CR7 to hit a hat-trick and eliminate the Spanish side 3-2 on aggregate.
International teammates becoming club rivals is just one of the intriguing subplots bubbling beneath the surface when two of Europe's finest teams clash on the opening day of Europe's most prestigious club competition.
It's unlikely that there will be a flurry of goals tonight but whatever happens at the Wanda Metropolitano, we might be witnessing the start of Portugal's changing of the guard.
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