The Guadalajara outfit's surge up the table has made the Clasico Nacional matter more than any time in recent memory, writes Jon Arnold.
Chivas and Club America both had midweek cup matches and came away with disappointing results.
The Guadalajara side lost the Copa MX final to Puebla, 4-2, while the current Liga MX champion couldn't top the Montreal Impact in a 1-1 draw in the first leg of the CONCACAF Champions League.
Perhaps the sides were stealing a glance away from their midweek obligations and toward Sunday's Clasico Nacional. It's been a while since the meeting between Mexico's most successful teams in history carried any sort of weight.