Agree with comme in this case. Also, it was also well known that Bilardo selected talent wise not his best squad. Based on talent and football-qualities alone the likes of attacking midfielder Marcico and defensive midfielder Barbas would have been included. The observers obviously saw what Bilardo was about to do, and whether his selected material could live up to the expectations. You are right that some official games leading up to the World Cup were not impressive, the friendly against France at March 1986 (at Parc des Princes) being one of those. But you'd be surprised to know which Argentinian midfielder was among the most disappointing players (the new prodigy Claudio Borghi was arguably the most disappointing one and this forward received a red card when the friendly progressed). Apparently the bookmakers were able to look past all of this, and also take into account the venue (with the experience of 1970 still fresh in the mind).