It is reported by MMA Junkie.
Moreover, this information was confirmed by the head of the UFC Dana White.
The 33-year-old Russian has won 34 victories and suffered nine defeats in his career.
In his last fight, which took place at the UFC 267 tournament in November, Volkov defeated the Pole Marcin Tybura.
Aspinall has 11 wins and two losses in MMA, and in the UFC, the Briton has a series of four fights won.
The media noted that the tournament will be held in London.
Earlier it was reported that former UFC champion Henry Cejudo expressed a desire to fight with Petr Yan.