A goal by Dario Rodriguez just before the break gave Uruguayan giant Penarol a valuable 1-0 win over Argentina's Velez in the first leg of the Copa Libertadores semi-finals.
Velez controlled the first half and created the best chances.
Penarol also had a couple of chances with
A shot by Alejandro Martinuccio came back off the crossbar.
But in the last move of the first half, Rodriguez headed in from a corner to give Penarol a 1-0 lead.
After the break Penarol tightened up its defence and made it very difficult for Velez to create chances.
Martinez headed in a cross but the goal was not allowed as he had pushed the ball into the next with his hand.
Penarol can make its first finals appearance in 24 years - it won it in 1987 - if it gets a draw or better in the second leg next week in