He played only for 2 teams:
1. Barca
2. Argentina
At Barca, he won CLs only when the team was BY FAR the best team in the world.
He never managed to drag a team when the team was = let's say among top3 or top5 best teams.
With Argentina, who is historically one of the best teams in the world, for years we have to read alibies how they suddenly have the worst team ever in the last 15 years (while Messi is playing) and how they dropped from WC and Copa America winners to a horrible team and how Messi can't help them.
We will finally be able to test Messi more.
I think that Messi in a CL KO matches will be a good old, semi-invisible/walking/easy to neutralize Messi whch we are seeing for years at Barca's shirt on away KO matches.
But hey, let's see whether Barca was the problem or Messi himself was the problem.
Something similar as Pep with prime Barca and Pep without it.
Argentina historically one of the best teams in the world
... before the copa america 2021 victory....30 years ago they won 2 copa america (1991 and 1993)...and another 30 years ago (1959) the won the last copa america !not even in the modern football. 2 WC..... 1986 with Maradona/the best WC performance ever and 1978 at home (under the ruling military junta around dictator Jorge Videla) with the scandal match (they BOUGHT the match) vs Peru (6-0) so they could qualify.
Then also Uruguay is historically one of the best team in the world
Test him... with 34 !! The past season you were the one who always wrote that he's done, old, slow, can no longer dribble,
and so on...but this no longer applies, now you want to test and judge him as he were 24 not 34 !
And as usual, should anyone not know who Messi is, it would be understood from your posts that Messi is an absolutely massively overrated player, a media hype, a circus freak, a cancer that has plagued Barcelona for the last 15 years.