Ake Loba scored against the defending MLS Cup champions in the ninth minute. Monterrey, which has lost three straight Liga MX games, was without key players Vincent Janssen, Maxi Meza and Ponchito González.
Columbus’ Lucas Zelarayan was given a yellow card in the 12th minute that will force him to miss next Wednesday’s game at Monterrey.
The winner of this quarterfinal will face the Toronto-Cruz Azul winner.
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