With another blowout Mexico victory in the books - a 5-0 win over Cuba on Thursday - and five Mexican players suspended for doping, the focus of the CONCACAF Gold Cup shifts for at least one night to Group B, where Jamaica can ensure itself a spot in the next stage with a win.

Jamaica opened the tournament as expected with a dominating 4-0 win over Grenada. The game did not serve as much of a barometer for how Jamaica will stack up against other competition in this tournament, but Friday night's match against Guatemala should provide more insight.

Guatemala somewhat surprisingly held on for a 0-0 draw with Honduras in its opening match on Tuesday, setting itself up to get out of the group. Three points against Grenada in the final group match on Monday should be a given, which would put Guatemala at four points and, at the very least, a third place finish in the group.

That makes tonight's showdown with Jamaica even more critical. If Guatemala can pull off even a draw, we will suddenly know that this team is for real, having obtained points from the top two teams in the group.

Guatemala was able to prevent Carlos Costly and company from finding the back of the net on Tuesday, but Jamaica's attack poses a more complete threat. San Jose Earthquakes striker Ryan Johnson serves as the point man in the attack, but Luton Shelton is equally threatening and Dane Richards makes up for his still developing technical ability with pure speed on the wing (although he could be found in the center of the park often against Grenada).

Mauricio Sabillón, Víctor Bernárdez and the rest of the Guatemalan back line will have its hands full, but a complete defensive effort from the underdogs could frustrate Jamaica, which despite a 4-0 win blew several chances to bury Grenada earlier in the match.

Guatemala's defense proved sound in its first test of the tournament, but picking up points against a Jamaica side that shwoed some of its potential on Monday would be even more impressive.

Friday's other fixture between Honduras and Grenada should not give the Hondurans any trouble, but there is no time for complacency for a team that expects to replicate 2009's run to the semifinals.

For los Catarachos , Friday's match against Grenada serves as confidence builder and a means of fine-tuning the team's play. Nothing is more important to a striker than being in form, and should Carlo Costly find the scoresheet on Friday, he will be able to generate the type of momentum all goal scorers need.

If things play out as expected on Friday, it would set up a huge final day of group play on Monday, with Jamaica and Honduras squaring off at the top of Group B. Ultimately, that is the most interesting match-up in a group that features a clearly out-classed Grenada side and a Guatemala team that could advance as a third place finisher.

More important than the actual fixtures in place Friday are the overlying questions that have been asked of this group since the tournament's start: Are Jamaica and Honduras actual contenders?

That question probably will not be answered until we see the two teams face each other on Monday. As Jamaica showed earlier in the week, Grenada is no measuring stick to answer that question. Against that same Grenada team, Honduras won't be able to answer it Friday night, either.

But the question that could be most prevalent is actually whether or not Guatemala can exceed expectations. A quarterfinal appearance would prove to be a successful tournament for Guatemala, a result that's close to reality after Tuesday's opening night draw with Honduras.

Jeff Kassouf is a freelance writer and proprietor of Equalizer Soccer who will be contributing to FOX Soccer's coverage of the Gold and Women's World Cups.