UFC Fight Night 191 continues to encounter lineup changes due to visa issues and travel restrictions. The previously scheduled Sept. 4 co-main event has been canceled. With Russia’s Sergei Pavlovich (14-1 MMA, 2-1 UFC) out due to visa issues, the promotion is currently eying Serghei Spivac (13-2 MMA, 4-2 UFC) as a heavyweight replacement to fight Tom Aspinall (10-2 MMA, 3-0 UFC) at the UFC Apex in Las Vegas.
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