BUENOS AIRES, Sept. 30 (Xinhua) -- Six-time champions Boca Juniors secured their place in the Copa Libertadores knockout stage on Tuesday, despite being held to a goalless home draw by Libertad.
Boca had 68% of possession and seven shots on target to Libertad's one, in what was largely a lopsided contest at La Bombonera.
However the Argentinian giants paid the price for the absence of a cutting edge in attack, registering their second draw from five matches in this season's campaign.
Miguel Angel Russo's men are now four points clear at the top of the Group H standings, with one match remaining before the knockout rounds.
Libertad are third, level on points with Caracas FC, but with an inferior goal difference.
Brazil's Gremio also secured their place in the tournament's next phase on Tuesday, with a 2-0 home win over Chilean side Universidad Catolica. Pepe and Antonio Rodrigues were on the scoresheet for the Porto Alegre outfit.
In the Uruguayan capital Montevideo, Penarol kept alive their hopes of progressing to the next stage, with a 3-0 win over Chile's visiting Colo-Colo.
And Ecuador's LDU Quito extended their lead at the top of Group D with a 4-0 rout of Binacional