Promotion officials announced the lightweight pairing on Thursday. UFC 204 takes place in Manchester, England, and is headlined by a middleweight title bout between Michael Bisping and Dan Henderson.
The 38-year-old Madadi was victorious in his first appearance of 2016, stopping Yan Cabral via third-round technical knockout at UFC Fight Night in Rotterdam this past May. “Mad Dog” is 3-2 in the Octagon overall, including a notable submission triumph of Michael Johnson in April 2013.
Diakese enters his promotional debut with a 9-0 professional record. The 23-year-old English fighter’s last five bouts have come under the British Association of Mixed Martial Arts banner, including back-to-back KO/TKO triumphs in his last two outings.