Barcelona enters as heavy favorites at home with a perfect 9-0-0 record and 27 points versus Alavés's 3-2-4 record with 11 points, though Barcelona's recent form has deteriorated with losses to Real Madrid and another defeat in their last two matches. Multiple key defensive injuries including Jules Koundé and Dani Olmo sideline Barcelona ahead of the October 31 matchup, but probability models still estimate Barcelona's win chance at 84-86%.