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.

Palhares' trainer, Murilo Bustamante, later confirmed the injury to MMAWeekly.com, which will keep the Brazilian Top Team fighter out of a planned bout against American Top Team fighter Alessio Sakara at UFC 101.

"Probably, he will be fighting again before the end of 2009," said Bustamante. "But right now, I can tell that Sakara is the luckiest man in the world. Rousimar won't fight in August 8 for sure."

With a 9-2 overall record, Palhares has gone 2-1 in the Octagon, his only UFC loss being a three-round unanimous decision to Dan Henderson. He rebounded in his most recent fight, at UFC 93, by scoring his own unanimous decision victory over Jeremy Horn.

Sakara, an Italian fighter, has gone 4-4 in his UFC tenure with one no contest. He most recently scored a brutal knockout of Joe Vedepo with a kick to the head at UFC Fight Night 15.

There has been no word yet as to who might replace Palhares, or if Sakara will even remain on the UFC 101 fight card in Philadelphia. The fight card is headlined by UFC lightweight champion B.J. Penn defending against Kenny Florian.