Costa Rica's Joel Campbell (12) celebrates with teammate Josue Martinez (R) past Bolivia's Jose Luis Chavez after he scored their second goal in the first round of the Copa America soccer tournament in Jujuy July 7, 2011. [Photo/Agencies]

JUJUY, Argentina - Costa Rica defeated 10-man Bolivia 2-0 on Thursday, boosting the Central Americans' hopes of reaching the knock-stage of the Copa America.

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Costa Rica, which is fielding a second-string team, went ahead through Josue Martinez's goal in the 60th minute and put the game away with Joel's Campbell's strike in the 79th.

Bolivia's Ronald Rivero was sent off in the 71st for using his arm to stop a goal-bound shot.

Colombia leads Group A with 4 points, followed by Costa Rica with 3, Argentina 2, and Bolivia 1. Each team has one match to play in the group stage, with the top two to progress to the quarterfinals, along with the best two third-placed teams in the three groups.