The best thing for Messi is to get a rest and dont play against Paraguay. I believe his teammates will not flop against one of the weakest teams..
No actually i think he'd do great if he played with them , especially if Barca won the CL. Messi played all the league games this season for the 1st time of his career , and he didnt miss any of barca's CL games . El Pulga Relieves himself while playing , he's so smart that he only gives a lot of effort only when the team needs him the most , like what we saw againt Bayern , City , and Real .
I wanna see him break Gabriel Batistuta Record for being the Top scorer of Argentina , Messi needs 19 goals to do so , it perhaps impossible to score 19 goals in one copa america , but im pretty sure Messi will break this record soon or later .