Vasco's 1-0 first-leg lead at La Bombonera came from the one thing Boca couldn't stop, Andrés Gómez getting down the flank, and Gómez is also the man who got sent off. The ten-man stretch is the part I'd carry into the return: Vasco lost their best outlet down the right and still held on, while Boca had the numbers and could not turn pressure into a goal. So the question is who solves their problem first: Vasco without the winger who created their goal, or Boca, who hit a post, a crossbar and a near-miss across the six-yard box last time and still left empty-handed.
Per Vistazo's match report, Adson headed in Gómez's cross in the 24th minute. Boca then pushed: Blanco's cross hit the post around the 54th, and after Gómez's second yellow in the 63rd Ascacíbar hit the bar and a ball crossed the box without Merentiel or Enner Valencia reaching it. Primicias' preview framed Boca's mission as replacing Leandro Paredes, so the creative gap in midfield was there before the first leg started.
A red card normally means a ban for the next game, but I haven't found a source confirming Gómez's status, so treat that as open. If Vasco have to rebuild that side, Boca's fullbacks get more room to push high, which is the one thing that made them dangerous last time. If Vasco keep the counter-attacking threat, Boca's high line is the exposed part. I'd watch whether Boca's early crosses find a runner or just feed Vasco's centre-backs.
