Overview
- Vasco won the first semifinal leg at La Bombonera on Tuesday when Adson headed home a cross around the 24th minute to make it 1-0.
- Carlos Andrés Gómez was sent off in the second half after receiving two yellow cards in seconds, leaving Vasco with ten men while Boca had much of the game to chase an equalizer but failed to score.
- The return is scheduled for Tuesday, Oct. 20 at 21:30 Argentina time but the venue is unsettled because a Rio court decision in favor of Vasco has been appealed by the Maracanã administrators and CONMEBOL has warned it could move the match to a neutral site such as Asunción.
- Boca will be without captain Leandro Paredes because of a grade‑2 hamstring tear and coach Rodolfo Arruabarrena’s long home unbeaten run ended with this loss, forcing tactical changes for the trip to Brazil.
- Competition rules mean a one-goal Boca win in the second leg would send the tie to penalties while a two‑goal victory would send Boca straight to the final on Nov. 21 in Barranquilla and the stadium capacity rule that bars São Januário from hosting the match is the reason Vasco sought the Maracanã.