The main event of this month’s UFC on ESPN+ 7 card in Russia has experienced a change on just 17 days’ notice. With Alexander Volkov (30-7 MMA, 4-1 UFC) no longer able to compete in the heavyweight headliner, Aleksei Oleinik (57-11-1 MMA, 6-2 UFC) will now meet Alistair Overeem (44-17 MMA, 9-6 UFC) on the card. MMA Junkie verified the change with a person close to the situation following an initial report from ESPN.com
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