With the talent Messi has, sometimes there is not a great deal you can do because he is so unpredictable.
Messi finally got off the mark in this year's World Cup with a glorious goal in the massive 2-1 win over Nigeria, ending 622 minutes of World Cup football without a goal and becoming the first player to score a World Cup goal in his teens, 20s and 30s. "He knows all the passion I put into everything I do", Sampaoli said.
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Group stage: The three games we played in the group stage left us with mixed feelings.
'They have had hard times and still have been able to qualify.
Sampaoli was unstinting in his praise of Messi, describing him as "the best player in the world" and a "genius", but preferred to focus more on the display he expected from his whole team on Saturday.
As France look to underperforming striker Antoine Griezmann to lift his game, Sampaoli underlined a bigger threat in 19-year-old Paris Saint-Germain midfielder Kylian Mbappe, who struck France's match victor in a 1-0 win over Peru, and 21-year-old Barcelona forward Ousmane Dembele.
Just as France know the threat of Messi, Argentina coach Sampaoli is fully aware of the dangers of an on-form France - led by Paris St Germain teenager Kylian Mbappe. He's got outstanding qualities. Since then, France are unbeaten in eight World Cup fixtures against CONMEBOL opposition (W4 D4).
France cruised to the round of 16 stage with much ease after registering two wins and a draw in group stages while on the other hand, Argentina stuttered in the first two games but ultimately secured qualification for advanced stages by winning the final group match. The last time these two sides met was in 2009 in an worldwide friendly which Messi and co had won 2-0.
Jorge Sampaoli's side may have disappointed, but they showed more in one game than France in three, scoring only two goals in open play.
We don't trust Argentina to shut out France, nor do we expect Les Bleus to deny the South Americans the goals they covet dearly.
"Honestly, I have not decided yet on the starting lineup". France, however, has looked like a solid squad.
The coach said France's characteristics of quick ball recovery and pace on the break through Antoine Griezmann and Olivier Giroud would make them particularly unsafe if Argentina were unable to dominate possession. They look like a exhausted team and that's why I'm going for France.