From MMA Weekly:
UFC fighter Rousimar Palhares suffered a fractured tibia in training while wrestling. He underwent surgery on Thursday night at Hospital Miguel Couto in Rio de Janeiro, Brazil, according to a report by Martins Denis on intheguard.tv.
MMAWeekly.com independently confirmed the injury, which will keep the Brazilian Top Team fighter out of a planned bout against American Top Team fighter Alessio Sakara at UFC 101.
Without a doubt, this is a terrible case of bad luck for Palhares who suffered a broken hand in his most recent fight, a decision victory over Jeremy Horn. The occurrence also sets the UFC back a bit since Palhares is one of the up-and-coming fighters in the chaotic middleweight division. The Brazilian's jiu-jitsu and physical strength present quite a test for anyone he faces.
For the moment, a replacement to face Sakara has yet to be named.