Boxing legend Leon Spinks has been hospitalised in Las Vegas.

Sources close to the 61-year-old Olympic gold medal winner, who famously beat Muhammad Ali in 1978, tell Tmz.com Spinks underwent surgery over the weekend (11-12Oct14) and there were complications.

The fighter's friend, singer Tony Orlando, has urged fans to "pray" for the boxer, adding he is "facing the greatest fight of his life".