BUENOS AIRES - Holders LDU face an early exit from South America's Libertadores Cup after losing 2-0 at Palmeiras who revived their hopes of making the knockout stage. Uruguay's Nacional clinched a place in the last 16 with a game to spare after a 1-1 draw at Peruvian champions Deportivo San Martin in Tuesday night's other group match. Second half goals by Marcao and Diego Souza gave Brazilians Palmeiras the points in Group One in Sao Paulo. Miller Bolanos of LDU and Marquinhos of Palmeiras were sent off for fighting in the 71st minute. The win left Colo Colo, Palmeiras and Sport Recife with seven points and LDU on four, although Colo Colo and Sport Recife have a game in hand. LDU, who last year became the first Ecuadorean side to win the trophy, need an unlikely combination of results to progress. In Lima, Gonzalo Luduena curled in an 88th minute equaliser from a free kick for San Martin after Marcos Mondaini had put Nacional in front 14 minutes earlier. The point guaranteed Group Three leaders Nacional, who have 11 points from five games, passage into the last 16. San Martin are second with eight points followed by Argentina's River Plate who have four and a game in hand.