FIFA World Cup Qualifier TuesdayColombia     vs     Peru    10.25pm SS3Ecuador     vs     Argentina    11pmWednesdayVenezuela     vs     Uruguay    2amChile     vs     Bolivia    2.25am SS3QUITO. Argentina travel to Ecuador for their latest 2014 World Cup qualifier with a big doubt hanging over the head of star striker Lionel Messi.A victory would all but assure the twice world champions’ place at next year’s showpiece in neighbours Brazil but without Messi, Argentina are not the same animal.They may lead the qualifying standings by five points from Colombia after the pair’s draw in Buenos Aires on Friday but that match showed just how important the Barcelona great is to the team. Messi played only the last half hour of an uninspiring match and afterwards his club and country teammate Javier Mascherano admitted the team isn’t the same without him."Obviously if everyone was thinking that we wouldn’t notice his absence, they were mistaken. There’s a reason he’s the best player in the world,” said Mascherano. Manchester City forward Sergio Aguero agreed: "You always notice it when Leo is in the team but we have to try to organise ourselves when he isn’t,” he added.The problem is Messi has been struggling with a hamstring injury for some time. It was the same injury that reduced him to a single brief substitute’s cameo in Barca’s 7-0 aggregate humiliation at the hands of Bayern Munich in the Champions League semifinals a month ago.According to press reports Argentina coach Alejandro Sabella is still unsure whether to risk Messi from the start or keep him on the bench.Either way, a victory would leave Argentina on 28 points which should be enough to take one of the top four qualifying spots, barring an unlikely winning run from several rivals.