Amanda Nunes TKOs Raquel Pennington to retain UFC women's bantamweight title
Brazil's Amanda Nunes improves her erecord to 16-4-0 win-loss-draw. AP

RIO DE JANEIRO — Amanda Nunes of Brazil has beaten American Raquel Pennington to defend her UFC bantamweight title for the third time.

The heavily favored Brazilian won by technical knockout in the fifth round early on Sunday in front of her home fans in Rio de Janeiro.

Earlier, former lightweight champion Vitor Belfort announced his retirement after losing to countryman and former champion Lyoto Machida by knockout.

American Kelvin Gastelum beat crowd favorite Ronaldo "Jacare" Souza in a split-decision.

Unbeaten Brazilian jiu-jitsu specialist Mackenzie Dern overcame American Amanda Cooper in the strawweight division. Dern, who made her UFC debut only two months ago and weighed in seven pounds above the limit on Friday, won by submission.

John Lineker beat Brian Kelleher in their bantamweight bout by knockout.

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