The contest was still in reach at halftime, but San Luis never loosened their grip. After edging the first half 1-0, the home side found more room after the restart and punished Universidad Catolica with three further goals. The scoreline quickly moved from narrow to crushing, and the visitors never found a route back into the match.
That pattern gave the result extra weight. Universidad Catolica had beaten San Luis 4-2 in the previous meeting between the clubs, yet this time the balance swung hard in the other direction. San Luis answered with their own four-goal display and a clean sheet, turning recent history on its head in front of home support at Estadio Municipal Lucio Farina Fernandez.
The stats behind the night did not need much dressing up - four for San Luis, none for Universidad Catolica, with a 1-0 first half followed by a 3-0 second half. For readers after the quick highlights and full summary, that was the story: a disciplined first half, a ruthless second, and one of the standout Copa Chile results of the round.