Jose Andres Guardado netted a brace as the Tricolor scored all four of their goals before half-time in Sunday's win against the Ticos.
Mexico's attack ran rampant on Sunday as the Tricolor earned a 4-1 victory over Costa Rica, securing a first-place finish in Gold Cup Group A.
Rafael Marquez scored the opener after 17 minutes, before Jose Andres Guardado (19', 26') netted a quickfire brace. Pablo Barrera added a fourth on 38 minutes, and Mexico entered the half-time break with a comfortable, 4-0 lead.
Apparently satisfied with their lead, the Tricolor eased off the throttle in the second half. Costa Rica pulled a goal back through Marcos Urena in the 69th minute, but his efforts were in vain as the Ticos succumbed to defeat.
The result sees Mexico advance to the quarter-finals having won each of their three matches and earned a +13 goal difference. There, the Tricolor will take on the third-place finishers in either Group B or C, depending on which team finishes with the best record. Costa Rica, too, qualify and will face the runner-up of Group B.