[4] A light heavyweight bout between the coaches of The Ultimate Fighter: Brazil 3 Chael Sonnen and Wanderlei Silva was originally scheduled for UFC 173.

[9] However, Sonnen subsequently failed his random drug test and was removed from the bout[10] and ultimately retired from the sport.

[11] The following day it was announced by MMA writer Kevin Iole that Belfort had also been removed from the card due to the inability of the UFC finding him a new opponent.

[15] During the event, Stefan Struve suffered a "near-fainting episode" and his bout with Matt Mitrione on the pay-per-view was canceled.

[20] ^ Fight didn't take place because of pre-fight "near-fainting episode" suffered by Struve; Although not reflected in the NSAC paperwork, both fighters still paid show/win bonuses[21]