There is not a UFC event this weekend, but stars from the MMA world have ascended on Milwaukee. Gamebred Boxing 4 takes place at Fiserv Forum and is headlined by boxing legend Roy Jones Jr. against former UFC lightweight champion Anthony Pettis . Also on the card, former UFC light heavyweight champion Vitor Belfort battles Ronaldo Souza , and former UFC featherweight champion Jose Aldo battles Jeremy Stephens .
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