7 pairs who feuded on WWE TV, and in real life

#1 Alberto Del Rio and Sin Cara

Del Rio takes it to Cara on RAW.

It's a bad sign that this is the former World Champion's second appearance on the list.

Even before joining the WWE, the two feuded in Mexico, with several reports of real-life backstage fights between the two, having to be broken up by other wrestlers.

In the company, the pair faced off in 2012, in a match which saw Del Rio try to unmask Cara. He has later claimed that it was in-character, but it was still a massive sign of disrespect.

Even now, the two trade insults on social media.