Racing's home games have carried a steady supply of chances, while Madrid can score quickly from a recovery without controlling possession. The central contest is whether Racing can keep its first pass and second ball alive against Madrid's pressure. Arouca should have more of the ball against Nacional, but the quality of its final contact has been less commanding than that possession suggests. Nacional's compact shape and left-side escape make that a closer contest than the coaching headlines imply.
Racing's Iván Martín and Prati can connect with Canales and Vicente, then seek another delivery into the box. Their Espanyol performance produced repeated shots even after they fell behind. Madrid's Bellingham and Tchouaméni can squeeze that first connection and release Güler or Diomande toward Mbappé. Racing are missing Andrés Martín and suspended Salinas, yet Prati is back in the squad and most likely starters were rested in the cup. Madrid have the stronger finish, but their away scoring and Racing's continuing home supply make a runaway margin a bigger demand. That's why I'm siding with Racing Santander.
Arouca's Sánchez and van Ee should find early passes, with Djouahra and Barbero the main box connection. Nacional's midfield screen held Braga largely to wide or contested finishes, and Song found Baeza on the break. Those five Nacional injuries were already present in that match; the same replacement defence and attacking receivers were involved. Arouca's recent league wins were narrow, and the Alverca passing dominance came with a long man advantage. I expect Nacional's block and outlet to keep the margin close, so I'm siding with Nacional.
