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A welterweight division affair has been added to UFC Fight Night: Silva vs. Sonnen as Paulo Thiago faces Gasan Umalatov. Thiago has won just two of his last seven under the UFC banner, with his last fight being a loss to Brandon Thatch at UFC Fight Night 32. Umalatov is currently winless under the UFC banner, dropping a fight to Neil Magny by decision at UFC 169. UFC Fight Night: Silva vs. Sonnen takes place on May 31st from the Ibirapuera Gymnasium in Sao Paulo, Brazil with Wanderlei Silva and Chael Sonnen headlining.
