Mask vs. Mask: Sin Caras duel on SmackDown in Mexico City

The heart of a luchador is his mask. After this Friday's SmackDown, one of the Sin Cara will have his heart torn away.

Both Sin Cara Azul and Sin Cara Negro will put their identity on the line in a Mask vs. Mask Match on Friday Night SmackDown, emanating from the Palacio De Los Deportes in Mexico City. (GET TICKETS)

Ever since September, when it was revealed that two Sin Caras were competing in WWE, tensions have escalated, including multiple physical confrontations. (HISTORY OF THE SIN CARAS RIVALRY)

Sin Cara Azul earned bragging rights over his twin, defeating Sin Cara Negro in their match at WWE Hell in a Cell, but the match was so closely contested that the question as to who the superior Superstar is still remains unanswered.

After Hell in a Cell, the darker luchador has repeatedly attacked his blue counterpart, leading to this Mask vs. Mask match-up in the Mexican capital.

Which luchador will save face by saving their "face?" Find out on SmackDown this Friday at 8/7 CT on Syfy.