The 1986 World Cup winner says Alejandro Sabella's side have too many defensive weaknesses and insists the nation's other key players must improve in the knockouts
Diego Maradona believes Argentina should be worried that Lionel Messi is the only player shining for the team at the World Cup.
The Albiceleste captain has been one of the stars of Brazil 2014 so far, scoring four important goals for his side as the South Americans progressed into the second round with maximum points from their group.
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"Lionel Messi is getting better with every match," he wrote in Times of India. "His face doesn't show it but it seems as if he has come to Brazil with a score to settle.
"Angel Di Maria was active after two quiet games and instrumental in a lot of moves that his team created. The same can't be said of [Sergio] Aguero who got injured, and [Gonzalo] Higuain.
"This is something that should worry Argentina. Messi is going great guns and scoring from different angles in every match but his partners in attack are hardly getting noticed.
"Of the six goals the team has scored, Messi got four, one was an own goal and the other was netted by left-back Rojo. A team harbouring high hopes needs contributions from others.
"When you are winning, it goes unnoticed but Argentina need more resistance in the midfield. Nigeria reached the danger zone at ease after crossing the centre circle because what [Javier] Mascherano and [Fernando] Gago had to offer wasn't strong enough.
"The deep defence was under pressure on a number of occasions and this is something that Alejandro Sabella has to sort out. The team needs better organisation and fighting quality behind him to build on what [Messi] is doing."