Just four points separate leaders Mexico from last-placed Jamaica heading into Saturday's fifth round of fixtures with no country having been able to take control of the group.
All of the top five teams have one win each, with Jamaica the only nation yet to record a victory. The Reggae Boyz, along with Mexico, have so far played four matches with Panama, Costa Rica, USA and Honduras all having had three outings.
Mexico started with three successive draws but they recorded their opening win last time out with a 1-0 triumph over Jamaica and Jose Manuel de la Torre's men will be hoping to build on that when they go to second-placed Panama on Saturday.
De la Torre knows his side have plenty to improve on though, saying: "We are at the top, but still have details to correct, especially in attack."
While De la Torre is demanding more from his side, Panama coach Julio Cesar Dely Valdes believes the Mexicans are already looking a team to be concerned about.
He said: "This Mexico is not the same that started the six-team group. It is a national squad that is growing in each round, but we are playing at home so we have to make ourselves greater."
Third-placed Costa Rica and Honduras, in fifth, both go in search of their second wins when they clash at the Nacional de San Jose stadium.
Honduras forward Jerry Bengtson is 'dreaming' of victory and insists he is not concerned that Costa Rica boast home advantage, saying: "It does not matter that they are hosts and will play in a crowded venue. We do not think about the environment. I dream about defeating them, but it is not important who scores."
Tomorrow's other match pitches fourth-placed United States against Jamaica in Kingston.
The USA claimed a notable scalp at the weekend when they beat Germany 4-3 in a friendly match but coach Jurgen Klinsmann believes Saturday's clash is likely to be a major test for his side.
"A lot of my players do not know what to expect," he said.
"It is a very different surrounding and they are not used to it, especially the ones who plays at Europe. It is kind of brutal.
"They are very physical rival."