Two spots, three teams. Group B of the CONCACAF Champions League has come down to the final week with any number of possibilities.

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Santos currently leads with 10 points from its five matches, but the Columbus Crew sits one point behind and Municipal two back. Only Joe Public from Trinidad & Tobago, with one point, has been eliminated.

Some questions will be answered Tuesday night at Nuevo Estadio Corona,where Santos hosts Municipal and can clinch a quarterfinal berth with a win or a draw. It could even get through with a loss, but would have to wait until Thursday to find out and then need Joe Public to win or draw.

Municipal will need a win, because a draw would leave it tied with Columbus at best, and having split the two games with the Crew, Columbus has won the head-to-head away goals tiebreaker.

Municipal, at least, can have the confidence of having drawn 2-2 against Santos a month ago at Estadio Mateo Flores. The Guatemalans rallied from an early 2-0 deficit, earning a share of the points thanks to Carlos Castillo's penalty kick with three minutes remaining.

"We expect a tough game," Santos defender Juan Pablo Santiago told Milenio.com. "It's very important to us because it will allow us to move to the next phase of the CONCACAF Champions League."

Santos hasn't won in its last two, including a 3-0 loss to Cruz Azul in Mexico City on Saturday that dropped it four points behind Monterrey in Group 1 of the Mexican Apertura. However, Argentine coach Ruben Omar Romano was encouraged by the way his team played.

"The truth, in my view, the result is the most misleading I have seen: the number of tries we had, the amount of driving the ball we had, the choices," he said. "But hey, the team performed well, tried hard, but did not have the strength. You leave with anger because the team deserved more."

Columbus can win Group B with a win against Joe Public Thursday in Trinidad and a Municipal win or draw against Santos. The MLS squad can even advance on a loss, provided Santos wins.

The struggling Crew earned a dramatic point away from home on the weekend, rallying to tie Toronto FC 2-2 at BMO Field. Will Hesmer became just the second goalkeeper in MLS history to score a goal when he knocked in a second-half stoppage time equalizer off a corner kick on Saturday.

"You hope that you're never in that situation where you have to scramble to score a last-minute goal," Hesmer told the Columbus Dispatch. "I had no idea (what I was doing). I just knew it was stoppage time."

Once vying to defending its Supporters Shield title, the Crew, now winless in its last six MLS matches, trails the New York Red Bulls by one point in the race for the Eastern Conference regular-season title. The Red Bulls can wrap up the division with a win against the New England Revolution Thursday at Red Bull Arena.

"We needed a kind of spark," Columbus coach Robert Warzycha said. "Maybe that was it."

Columbus will be looking to advance to the knockout stage for a second consecutive year - it was the lone MLS squad to do so a year ago. Joe Public, meanwhile, will look to play the part of spoiler. The two teams played at Crew Stadium on September 14 with Columbus winning 3-0 on goals by Leandre Griffit, Jason Garey and Steven Lenhart.