Tight contests aplenty
© AFP

The group phase of the 50th Copa Libertadores kicked off this week. Aside from San Lorenzo's defeat of San Luis and a three-goal stroll for Boyaca Chico in Bolivia, there was little or nothing to chose between the sides involved in the other seven games. FIFA.com rounds up all the news.

Game of the week
Nacional 2-1 Universidad San Martin, (Group 3)
Goals: Federico Dominguez 30, Nicolas Lodeiro 90 (Nacional); Martin Arzuaga 38 (San Martin)

Nacional found it hard to break San Martin's resistance on a testing evening in Montevideo. Dominguez's precise free-kick augured a comfortable evening for the Uruguayans but, within minutes a defensive lapse allowed Arzuaga to pull the visitors level. The home side's persistence paid off, however, when Lodeiro struck deep into injury time to give Nacional the perfect start to their campaign.

Surprise of the week
Aurora 0-3 Boyaca Chico (Group 7)
Goals: Anthony Tapia 44 and 79, Juan Mahecha 90

Some opportunistic finishing ensured Boyaca claimed the three points in an entertaining game. Aurora keeper Silvio Dulcich stopped everything the Colombians threw at him in the opening 44 minutes, only for Tapia to pounce on the stroke of half-time. Controlling possession intelligently in the second half, Boyaca protected their lead before putting the game beyond their hosts' reach late on.

Elsewhere
The only other away win of the week came in Asuncion, where Deportivo Tachira of Venezuela pulled off an equally notable 2-1 win over Group 2 rivals Guarani. Despite falling behind to a Pedro Chavez goal, Deportivo held their nerve and responded with strikes from Gerzon Chacon and Edgar Perez.

San Lorenzo made short work of Mexican guests San Luis thanks to the finishing skills of Andres Silvera and Gonzalo Bergessio. Leading 3-0 after only half an hour, El Ciclón sauntered to a comfortable 4-1 win to take to the top of Group 8.

The other Mexican side to travel to Argentina this week were Chivas, who played out a frustrating 1-1 draw with Lanus in Group 6. The Rebaño Sagrado got off to the best possible start when Sergio Avila put them ahead inside 60 seconds. And that is the way the scoreline stayed until the third minute of injury time, when Jose Sand popped up to rescue a point for El Granate.

River Plate were another Argentinian side to leave it late after Group 3 opponents Nacional of Paraguay had thwarted their best efforts for much of the evening. But just as the Estadio Monumental faithful were beginning to abandon hope, Diego Buonanotte struck in the closing moments to give the Millonarios their first victory in four months.

Libertad of Paraguay had their fair share of problems at home, too, eventually overcoming Peru's Universitario 2-1 in Group 8, while Uruguayan hopefuls Defensor Sporting got their Group 4 bid off to a positive start with a 1-0 defeat of America de Cali.

In the final game of the week, Deportivo Quito snatched a valuable 1-1 draw from their visit to Universitario de Sucre in Group 5. With heavyweights Estudiantes and Cruzeiro completing the section, that point could come in very handy for the Ecuadorians.

Player of the week
Andres Silvera (San Lorenzo)
With rumours circulating about his departure from the club, the 32-year-old goal-getter gave another finishing masterclass, scoring twice in his side's comfortable win over San Luis. Can the man they call El Cuqui kick on and finish the tournament as the top scorer?

The stat
4 -
The number of goals scored in injury time in this week's games. Three of them turned out to be vital, with Lanus securing a last-gasp draw and Nacional and River both leaving it very late to claim important wins.

What they said
"You have to win Copa matches like this any way you can. We didn't play well but when you consider how we've been doing lately these are three vital points," River scorer Diego Buonanotte.

This week's results
Tuesday 10
Guarani (PAR) 1-2 Deportivo Tachira (VEN)
Defensor Sporting (URU) 1-0 America de Cali (COL)
Aurora (BOL) 0-3 Boyaca Chico (COL)

Wednesday 11
Lanus (ARG) 1-1 Chivas (MEX)
San Lorenzo (ARG) 4-1 San Luis (MEX)
Libertad (PAR) 2-1 Universitario (PER)

Thursday 12
Nacional (URU) 2-1 San Martin (PER)
River Plate (ARG) 1-0 Nacional (PAR)
Universitario de Sucre (BOL) 1-1 Deportivo Quito (ECU)