Mexican club Guadalajara took a large stride towards the knockout stages of the Copa Libertadores by beating Caracas of Venezuela 1-0 on Wednesday, moving top of Group 6.
Brazil's Gremio and Deportivo Tachira of Venezuela also registered 1-0 wins to boost their qualification hopes, while Everton of Chile and Lanus of Argentina played out a tense 1-1 draw.
Guadalajara's home win, despite playing with 10 men for more than 30 minutes, avenged a meek 2-0 defeat in Caracas last week.
Jonny Magallon was sent off for his second bookable offence after an hour played, but Chivas continued to push forward and Galindo rose to nod home the winner from a Gonzalo Pineda freekick in the 81st minute.
In the third minute of injury time, Caracas almost snatched an equalizer when Jaime Bustamante's header from a corner hit the post, but the ball rebounded into the grateful arms of goalkeeper Michel on the goal line.
Group rivals Everton and Lanus played out a draw in Vina del Mar earlier in the day.
Lanus' Diego Gonzalez pushed home the opener with his thigh in first half stoppage time, but the Argentines lacked spark even when ahead.
Everton emerged for the second half with renewed purpose and were back on level terms when Carlos Bossio's tripped Roberto Gutierrez for a penalty. Ezequiel Miralles slotted the spot kick down the middle to equalize.
Everton hit the bar as the game wound down and Miralles had the chance to seal three points in injury time, but he scuffed his shot after rounding Bossio.
Lanus, Argentine league leaders, has found life more difficult on the continental stage, and remains bottom of the group with two points. Everton has four points. Chivas and Caracas, having played an additional game, are on seven and six respectively.
Deportivo Tachira claimed a vital 1-0 home victory over Ecuador's Deportivo Cuenca to move into second place in Group 2.
Midfielder Jose Javier Villafraz scored the winner after 67 minutes with a precise strike from the edge of the box.
Tachira was reduced to ten men in the 39th minute after defender Julio Cesar Machado was shown a second yellow card for a deliberate hand ball.
It was ten men each when Cuenca defender Juan Guerron was also sent off after 63 minutes for a second bookable offence.
Tachira held on for a deserved victory to move level with Boca Juniors on six points at the top of Group 2, though the Argentines have played a game less and have a better goal difference.
Cuenca remains on three points after three games played, with Paraguay's Guarani bottom after two successive defeats.
Elsewhere, Gremio secured a useful three points on the road against Colombia's Boyaca Chico with a 1-0 victory that put them joint top of Group 7 with Universidad de Chile.
A war of words had erupted beforehand, with Chico's management angered by Gremio's suggestion the match should be switched from the high altitude of Tunja for security reasons.
The game went ahead as scheduled, and Gremio secured three points with a driven freekick from midfielder Souza in the 32nd minute. Chico's hopes of a comeback were dealt a blow in the 76th minute when Juan Mahecha was sent off for diving.
Chico has three points, one behind the joint group leaders, while Bolivia's Aurora is pointless at the bottom.