RIO DE JANEIRO, May 2 (Xinhua) -- Corinthians will need an early goal if they are to overturn a 0-1 deficit against Boca Juniors in their Copa Libertadores round of 16 second leg on May 15, said Brazilian striker Alexandre Pato on Thursday.
The defending champions must score twice and keep a clean sheet at the Pacaembu Stadium in Sao Paulo if they are to progress to the quarterfinals of South America's premier club competition.
"Unfortunately we weren't able to do what we hoped, but we have managed to come away with a result that isn't so bad," the former AC Milan striker said of his team's defeat at the Bombonera in Buenos Aires on Wednesday.
"Now we have to score an early goal and then try to score a second so that we can finish the game off."
Boca are likely to recall former Villarreal and Argentina international playmaker Juan Roman Riquelme for the clash after the 34-year-old missed Wednesday match with a thigh injury.
Pato, who joined Corinthians from AC Milan for a reported 15 million Euros in January, has yet to rediscover his best form after a series of injuries ravaged his final two seasons at the San Siro.
He was introduced as a 75th-minute substitute by coach Tite on Wednesday, replacing young playmaker Romarinho.