https://youtu.be/UUkdAwPG0_0

Brotherly love runs deep with Anthony and Sergio Pettis.

Although the Pettis brothers are very close, the two UFC veterans surely have had their moments of disparity growing up. In this case, it was just big brother Anthony simply playing a painful trick on younger brother Sergio.

Check out this classic Throwback Thursday clip of Anthony kicking Sergio with a tricky low blow.

It hurts just to watch!