This past weekend Marc Diakiese impressed everyone with a thorough first round domination of Teemu "Pacu" Packalen, ultimately ending with a highlight reel one punch KO: In retrospect, the fight also has another point of interest: Marc Diakiese landed a flush sidekick to Packalen's knee while the latter was coming forward, likely causing the first verifiable knee injury involving the technique in the UFC. I made a Gif of the sidekick and Teemu's subsequent limping: Packalen got his knee MRI'd right after the fight and the results indicate a torn MCL, and according to his doctor, it will likely require surgery. (Source from Finnish Media.) Since the technique has been seen as highly controversial on Sherdog ever since Jones started doing them, I feel like this marks a good moment to bring up the debate once more: should kicks to the knee be illegal, or should this injury be considered just like any other that takes place during a fight? Discuss.